[PATCH AUTOSEL 5.5 04/35] bpf: Fix deadlock with rq_lock in bpf_send_signal()

[PATCH AUTOSEL 5.5 04/35] bpf: Fix deadlock with rq_lock in bpf_send_signal()

[Sasha Levin]

From: Yonghong Song <yhs@fb.com>

[ Upstream commit 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 ]

When experimenting with bpf_send_signal() helper in our production
environment (5.2 based), we experienced a deadlock in NMI mode:
   #5 [ffffc9002219f770] queued_spin_lock_slowpath at ffffffff8110be24
   #6 [ffffc9002219f770] _raw_spin_lock_irqsave at ffffffff81a43012
   #7 [ffffc9002219f780] try_to_wake_up at ffffffff810e7ecd
   #8 [ffffc9002219f7e0] signal_wake_up_state at ffffffff810c7b55
   #9 [ffffc9002219f7f0] __send_signal at ffffffff810c8602
  #10 [ffffc9002219f830] do_send_sig_info at ffffffff810ca31a
  #11 [ffffc9002219f868] bpf_send_signal at ffffffff8119d227
  #12 [ffffc9002219f988] bpf_overflow_handler at ffffffff811d4140
  #13 [ffffc9002219f9e0] __perf_event_overflow at ffffffff811d68cf
  #14 [ffffc9002219fa10] perf_swevent_overflow at ffffffff811d6a09
  #15 [ffffc9002219fa38] ___perf_sw_event at ffffffff811e0f47
  #16 [ffffc9002219fc30] __schedule at ffffffff81a3e04d
  #17 [ffffc9002219fc90] schedule at ffffffff81a3e219
  #18 [ffffc9002219fca0] futex_wait_queue_me at ffffffff8113d1b9
  #19 [ffffc9002219fcd8] futex_wait at ffffffff8113e529
  #20 [ffffc9002219fdf0] do_futex at ffffffff8113ffbc
  #21 [ffffc9002219fec0] __x64_sys_futex at ffffffff81140d1c
  #22 [ffffc9002219ff38] do_syscall_64 at ffffffff81002602
  #23 [ffffc9002219ff50] entry_SYSCALL_64_after_hwframe at ffffffff81c00068

The above call stack is actually very similar to an issue
reported by Commit eac9153f2b58 ("bpf/stackmap: Fix deadlock with
rq_lock in bpf_get_stack()") by Song Liu. The only difference is
bpf_send_signal() helper instead of bpf_get_stack() helper.

The above deadlock is triggered with a perf_sw_event.
Similar to Commit eac9153f2b58, the below almost identical reproducer
used tracepoint point sched/sched_switch so the issue can be easily caught.
  /* stress_test.c */
  #include <stdio.h>
  #include <stdlib.h>
  #include <sys/mman.h>
  #include <pthread.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <fcntl.h>

  #define THREAD_COUNT 1000
  char *filename;
  void *worker(void *p)
  {
        void *ptr;
        int fd;
        char *pptr;

        fd = open(filename, O_RDONLY);
        if (fd < 0)
                return NULL;
        while (1) {
                struct timespec ts = {0, 1000 + rand() % 2000};

                ptr = mmap(NULL, 4096 * 64, PROT_READ, MAP_PRIVATE, fd, 0);
                usleep(1);
                if (ptr == MAP_FAILED) {
                        printf("failed to mmap\n");
                        break;
                }
                munmap(ptr, 4096 * 64);
                usleep(1);
                pptr = malloc(1);
                usleep(1);
                pptr[0] = 1;
                usleep(1);
                free(pptr);
                usleep(1);
                nanosleep(&ts, NULL);
        }
        close(fd);
        return NULL;
  }

  int main(int argc, char *argv[])
  {
        void *ptr;
        int i;
        pthread_t threads[THREAD_COUNT];

        if (argc < 2)
                return 0;

        filename = argv[1];

        for (i = 0; i < THREAD_COUNT; i++) {
                if (pthread_create(threads + i, NULL, worker, NULL)) {
                        fprintf(stderr, "Error creating thread\n");
                        return 0;
                }
        }

        for (i = 0; i < THREAD_COUNT; i++)
                pthread_join(threads[i], NULL);
        return 0;
  }
and the following command:
  1. run `stress_test /bin/ls` in one windown
  2. hack bcc trace.py with the following change:
     --- a/tools/trace.py
     +++ b/tools/trace.py
     @@ -513,6 +513,7 @@ BPF_PERF_OUTPUT(%s);
              __data.tgid = __tgid;
              __data.pid = __pid;
              bpf_get_current_comm(&__data.comm, sizeof(__data.comm));
     +        bpf_send_signal(10);
      %s
      %s
              %s.perf_submit(%s, &__data, sizeof(__data));
  3. in a different window run
     ./trace.py -p $(pidof stress_test) t:sched:sched_switch

The deadlock can be reproduced in our production system.

Similar to Song's fix, the fix is to delay sending signal if
irqs is disabled to avoid deadlocks involving with rq_lock.
With this change, my above stress-test in our production system
won't cause deadlock any more.

I also implemented a scale-down version of reproducer in the
selftest (a subsequent commit). With latest bpf-next,
it complains for the following potential deadlock.
  [   32.832450] -> #1 (&p->pi_lock){-.-.}:
  [   32.833100]        _raw_spin_lock_irqsave+0x44/0x80
  [   32.833696]        task_rq_lock+0x2c/0xa0
  [   32.834182]        task_sched_runtime+0x59/0xd0
  [   32.834721]        thread_group_cputime+0x250/0x270
  [   32.835304]        thread_group_cputime_adjusted+0x2e/0x70
  [   32.835959]        do_task_stat+0x8a7/0xb80
  [   32.836461]        proc_single_show+0x51/0xb0
  ...
  [   32.839512] -> #0 (&(&sighand->siglock)->rlock){....}:
  [   32.840275]        __lock_acquire+0x1358/0x1a20
  [   32.840826]        lock_acquire+0xc7/0x1d0
  [   32.841309]        _raw_spin_lock_irqsave+0x44/0x80
  [   32.841916]        __lock_task_sighand+0x79/0x160
  [   32.842465]        do_send_sig_info+0x35/0x90
  [   32.842977]        bpf_send_signal+0xa/0x10
  [   32.843464]        bpf_prog_bc13ed9e4d3163e3_send_signal_tp_sched+0x465/0x1000
  [   32.844301]        trace_call_bpf+0x115/0x270
  [   32.844809]        perf_trace_run_bpf_submit+0x4a/0xc0
  [   32.845411]        perf_trace_sched_switch+0x10f/0x180
  [   32.846014]        __schedule+0x45d/0x880
  [   32.846483]        schedule+0x5f/0xd0
  ...

  [   32.853148] Chain exists of:
  [   32.853148]   &(&sighand->siglock)->rlock --> &p->pi_lock --> &rq->lock
  [   32.853148]
  [   32.854451]  Possible unsafe locking scenario:
  [   32.854451]
  [   32.855173]        CPU0                    CPU1
  [   32.855745]        ----                    ----
  [   32.856278]   lock(&rq->lock);
  [   32.856671]                                lock(&p->pi_lock);
  [   32.857332]                                lock(&rq->lock);
  [   32.857999]   lock(&(&sighand->siglock)->rlock);

  Deadlock happens on CPU0 when it tries to acquire &sighand->siglock
  but it has been held by CPU1 and CPU1 tries to grab &rq->lock
  and cannot get it.

  This is not exactly the callstack in our production environment,
  but sympotom is similar and both locks are using spin_lock_irqsave()
  to acquire the lock, and both involves rq_lock. The fix to delay
  sending signal when irq is disabled also fixed this issue.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200304191104.2796501-1-yhs@fb.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/bpf_trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index e5ef4ae9edb50..0e553b1706d37 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -731,7 +731,7 @@ BPF_CALL_1(bpf_send_signal, u32, sig)
 	if (unlikely(!nmi_uaccess_okay()))
 		return -EPERM;
 
-	if (in_nmi()) {
+	if (irqs_disabled()) {
 		/* Do an early check on signal validity. Otherwise,
 		 * the error is lost in deferred irq_work.
 		 */
-- 
2.20.1

[PATCH AUTOSEL 5.5 05/35] net/mlx5e: kTLS, Fix wrong value in record tracker enum

[Sasha Levin]

From: Tariq Toukan <tariqt@mellanox.com>

[ Upstream commit f28ca65efa87b3fb8da3d69ca7cb1ebc0448de66 ]

Fix to match the HW spec: TRACKING state is 1, SEARCHING is 2.
No real issue for now, as these values are not currently used.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h
index a3efa29a4629d..63116be6b1d60 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h
@@ -38,8 +38,8 @@ enum {
 
 enum {
 	MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_START     = 0,
-	MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_SEARCHING = 1,
-	MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_TRACKING  = 2,
+	MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_TRACKING  = 1,
+	MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_SEARCHING = 2,
 };
 
 struct mlx5e_ktls_offload_context_tx {
-- 
2.20.1

[PATCH AUTOSEL 5.5 06/35] iwlwifi: mvm: take the required lock when clearing time event data

[Sasha Levin]

From: Avraham Stern <avraham.stern@intel.com>

[ Upstream commit 089e5016d7eb063712063670e6da7c1a4de1a5c1 ]

When receiving a session protection end notification, the time event
data is cleared without holding the required lock. Fix it.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151128.a49846a634e4.Id1ada7c5a964f5e25f4d0eacc2c4b050015b46a2@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/time-event.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
index c0b420fe5e48f..1babc4bb5194b 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c
@@ -785,7 +785,9 @@ void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
 		if (!le32_to_cpu(notif->status)) {
 			iwl_mvm_te_check_disconnect(mvm, vif,
 						    "Session protection failure");
+			spin_lock_bh(&mvm->time_event_lock);
 			iwl_mvm_te_clear_data(mvm, te_data);
+			spin_unlock_bh(&mvm->time_event_lock);
 		}
 
 		if (le32_to_cpu(notif->start)) {
@@ -801,7 +803,9 @@ void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm,
 			 */
 			iwl_mvm_te_check_disconnect(mvm, vif,
 						    "No beacon heard and the session protection is over already...");
+			spin_lock_bh(&mvm->time_event_lock);
 			iwl_mvm_te_clear_data(mvm, te_data);
+			spin_unlock_bh(&mvm->time_event_lock);
 		}
 
 		goto out_unlock;
-- 
2.20.1

[PATCH AUTOSEL 5.5 07/35] iwlwifi: consider HE capability when setting LDPC

[Sasha Levin]

From: Mordechay Goodstein <mordechay.goodstein@intel.com>

[ Upstream commit cb377dfda1755b3bc01436755d866c8e5336a762 ]

The AP may set the LDPC capability only in HE (IEEE80211_HE_PHY_CAP1),
but we were checking it only in the HT capabilities.

If we don't use this capability when required, the DSP gets the wrong
configuration in HE and doesn't work properly.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Fixes: befebbb30af0 ("iwlwifi: rs: consider LDPC capability in case of HE")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151128.492d167c1a25.I1ad1353dbbf6c99ae57814be750f41a1c9f7f4ac@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
index e2cf9e015ef8c..80ef238a84884 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -147,7 +147,11 @@ static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm,
 	     (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
 		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
 
-	/* consider our LDPC support in case of HE */
+	/* consider LDPC support in case of HE */
+	if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] &
+	    IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
+		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
+
 	if (sband->iftype_data && sband->iftype_data->he_cap.has_he &&
 	    !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] &
 	     IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
-- 
2.20.1

[PATCH AUTOSEL 5.5 08/35] iwlwifi: yoyo: don't add TLV offset when reading FIFOs

[Sasha Levin]

From: Mordechay Goodstein <mordechay.goodstein@intel.com>

[ Upstream commit a5688e600e78f9fc68102bf0fe5c797fc2826abe ]

The TLV offset is only used to read registers, while the offset used for
the FIFO addresses are hard coded in the driver and not given by the
TLV.

If we try to apply the TLV offset when reading the FIFOs, we'll read
from invalid addresses, causing the driver to hang.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Fixes: 8d7dea25ada7 ("iwlwifi: dbg_ini: implement Rx fifos dump")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151129.fbab869c26fa.I4ddac20d02f9bce41855a816aa6855c89bc3874e@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index 4c60f9959f7bf..e5c9149099886 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -8,7 +8,7 @@
  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -31,7 +31,7 @@
  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1407,11 +1407,7 @@ static int iwl_dump_ini_rxf_iter(struct iwl_fw_runtime *fwrt,
 		goto out;
 	}
 
-	/*
-	 * region register have absolute value so apply rxf offset after
-	 * reading the registers
-	 */
-	offs += rxf_data.offset;
+	offs = rxf_data.offset;
 
 	/* Lock fence */
 	iwl_write_prph_no_grab(fwrt->trans, RXF_SET_FENCE_MODE + offs, 0x1);
-- 
2.20.1

[PATCH AUTOSEL 5.5 09/35] iwlwifi: dbg: don't abort if sending DBGC_SUSPEND_RESUME fails

[Sasha Levin]

From: Luca Coelho <luciano.coelho@intel.com>

[ Upstream commit 699b760bd29edba736590fffef7654cb079c753e ]

If the firmware is in a bad state or not initialized fully, sending
the DBGC_SUSPEND_RESUME command fails but we can still collect logs.

Instead of aborting the entire dump process, simply ignore the error.
By removing the last callpoint that was checking the return value, we
can also convert the function to return void.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Fixes: 576058330f2d ("iwlwifi: dbg: support debug recording suspend resume command")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151129.dcec37b2efd4.I8dcd190431d110a6a0e88095ce93591ccfb3d78d@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 15 +++++----------
 drivers/net/wireless/intel/iwlwifi/fw/dbg.h |  6 +++---
 2 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index e5c9149099886..bf93da0b04aef 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2491,10 +2491,7 @@ static void iwl_fw_dbg_collect_sync(struct iwl_fw_runtime *fwrt, u8 wk_idx)
 		goto out;
 	}
 
-	if (iwl_fw_dbg_stop_restart_recording(fwrt, &params, true)) {
-		IWL_ERR(fwrt, "Failed to stop DBGC recording, aborting dump\n");
-		goto out;
-	}
+	iwl_fw_dbg_stop_restart_recording(fwrt, &params, true);
 
 	IWL_DEBUG_FW_INFO(fwrt, "WRT: Data collection start\n");
 	if (iwl_trans_dbg_ini_valid(fwrt->trans))
@@ -2659,14 +2656,14 @@ static int iwl_fw_dbg_restart_recording(struct iwl_trans *trans,
 	return 0;
 }
 
-int iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt,
-				      struct iwl_fw_dbg_params *params,
-				      bool stop)
+void iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt,
+				       struct iwl_fw_dbg_params *params,
+				       bool stop)
 {
 	int ret = 0;
 
 	if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status))
-		return 0;
+		return;
 
 	if (fw_has_capa(&fwrt->fw->ucode_capa,
 			IWL_UCODE_TLV_CAPA_DBG_SUSPEND_RESUME_CMD_SUPP))
@@ -2683,7 +2680,5 @@ int iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt,
 			iwl_fw_set_dbg_rec_on(fwrt);
 	}
 #endif
-
-	return ret;
 }
 IWL_EXPORT_SYMBOL(iwl_fw_dbg_stop_restart_recording);
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
index 179f2905d56b0..9d3513213f5ff 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
@@ -239,9 +239,9 @@ _iwl_fw_dbg_trigger_simple_stop(struct iwl_fw_runtime *fwrt,
 	_iwl_fw_dbg_trigger_simple_stop((fwrt), (wdev),		\
 					iwl_fw_dbg_get_trigger((fwrt)->fw,\
 							       (trig)))
-int iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt,
-				      struct iwl_fw_dbg_params *params,
-				      bool stop);
+void iwl_fw_dbg_stop_restart_recording(struct iwl_fw_runtime *fwrt,
+				       struct iwl_fw_dbg_params *params,
+				       bool stop);
 
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 static inline void iwl_fw_set_dbg_rec_on(struct iwl_fw_runtime *fwrt)
-- 
2.20.1

[PATCH AUTOSEL 5.5 10/35] iwlwifi: mvm: Fix rate scale NSS configuration

[Sasha Levin]

From: Ilan Peer <ilan.peer@intel.com>

[ Upstream commit ce19801ba75a902ab515dda03b57738c708d0781 ]

The TLC configuration did not take into consideration the station's
SMPS configuration, and thus configured rates for 2 NSS even if
static SMPS was reported by the station. Fix this.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151129.b4f940d13eca.Ieebfa889d08205a3a961ae0138fb5832e8a0f9c1@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/wireless/intel/iwlwifi/mvm/rs-fw.c    | 29 ++++++++++++++-----
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
index 80ef238a84884..ca99a9c4f70ef 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -6,7 +6,7 @@
  * GPL LICENSE SUMMARY
  *
  * Copyright(c) 2017        Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -27,7 +27,7 @@
  * BSD LICENSE
  *
  * Copyright(c) 2017        Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -195,11 +195,13 @@ rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta,
 {
 	u16 supp;
 	int i, highest_mcs;
+	u8 nss = sta->rx_nss;
 
-	for (i = 0; i < sta->rx_nss; i++) {
-		if (i == IWL_TLC_NSS_MAX)
-			break;
+	/* the station support only a single receive chain */
+	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+		nss = 1;
 
+	for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
 		highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
 		if (!highest_mcs)
 			continue;
@@ -245,8 +247,13 @@ rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta,
 	u16 tx_mcs_160 =
 		le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160);
 	int i;
+	u8 nss = sta->rx_nss;
 
-	for (i = 0; i < sta->rx_nss && i < IWL_TLC_NSS_MAX; i++) {
+	/* the station support only a single receive chain */
+	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+		nss = 1;
+
+	for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
 		u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
 		u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
 		u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
@@ -307,8 +314,14 @@ static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
 		cmd->mode = IWL_TLC_MNG_MODE_HT;
 		cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] =
 			cpu_to_le16(ht_cap->mcs.rx_mask[0]);
-		cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
-			cpu_to_le16(ht_cap->mcs.rx_mask[1]);
+
+		/* the station support only a single receive chain */
+		if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
+				0;
+		else
+			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
+				cpu_to_le16(ht_cap->mcs.rx_mask[1]);
 	}
 }
 
-- 
2.20.1

[PATCH AUTOSEL 5.5 13/35] rxrpc: Abstract out the calculation of whether there's Tx space

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit 158fe6665389964a1de212818b4a5c52b7f7aff4 ]

Abstract out the calculation of there being sufficient Tx buffer space.
This is reproduced several times in the rxrpc sendmsg code.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/sendmsg.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 813fd68881429..a13051d380973 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -17,6 +17,21 @@
 #include <net/af_rxrpc.h>
 #include "ar-internal.h"
 
+/*
+ * Return true if there's sufficient Tx queue space.
+ */
+static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win)
+{
+	unsigned int win_size =
+		min_t(unsigned int, call->tx_winsize,
+		      call->cong_cwnd + call->cong_extra);
+	rxrpc_seq_t tx_win = READ_ONCE(call->tx_hard_ack);
+
+	if (_tx_win)
+		*_tx_win = tx_win;
+	return call->tx_top - tx_win < win_size;
+}
+
 /*
  * Wait for space to appear in the Tx queue or a signal to occur.
  */
@@ -26,9 +41,7 @@ static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx,
 {
 	for (;;) {
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (call->tx_top - call->tx_hard_ack <
-		    min_t(unsigned int, call->tx_winsize,
-			  call->cong_cwnd + call->cong_extra))
+		if (rxrpc_check_tx_space(call, NULL))
 			return 0;
 
 		if (call->state >= RXRPC_CALL_COMPLETE)
@@ -68,9 +81,7 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
 		set_current_state(TASK_UNINTERRUPTIBLE);
 
 		tx_win = READ_ONCE(call->tx_hard_ack);
-		if (call->tx_top - tx_win <
-		    min_t(unsigned int, call->tx_winsize,
-			  call->cong_cwnd + call->cong_extra))
+		if (rxrpc_check_tx_space(call, &tx_win))
 			return 0;
 
 		if (call->state >= RXRPC_CALL_COMPLETE)
@@ -302,9 +313,7 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
 
 			_debug("alloc");
 
-			if (call->tx_top - call->tx_hard_ack >=
-			    min_t(unsigned int, call->tx_winsize,
-				  call->cong_cwnd + call->cong_extra)) {
+			if (!rxrpc_check_tx_space(call, NULL)) {
 				ret = -EAGAIN;
 				if (msg->msg_flags & MSG_DONTWAIT)
 					goto maybe_error;
-- 
2.20.1

[PATCH AUTOSEL 5.5 14/35] rxrpc: Fix call interruptibility handling

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit e138aa7d3271ac1b0690ae2c9b04d51468dce1d6 ]

Fix the interruptibility of kernel-initiated client calls so that they're
either only interruptible when they're waiting for a call slot to come
available or they're not interruptible at all.  Either way, they're not
interruptible during transmission.

This should help prevent StoreData calls from being interrupted when
writeback is in progress.  It doesn't, however, handle interruption during
the receive phase.

Userspace-initiated calls are still interruptable.  After the signal has
been handled, sendmsg() will return the amount of data copied out of the
buffer and userspace can perform another sendmsg() call to continue
transmission.

Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/afs/rxrpc.c          |  3 ++-
 include/net/af_rxrpc.h  |  8 +++++++-
 net/rxrpc/af_rxrpc.c    |  4 ++--
 net/rxrpc/ar-internal.h |  4 ++--
 net/rxrpc/call_object.c |  3 +--
 net/rxrpc/conn_client.c | 13 +++++++++---
 net/rxrpc/sendmsg.c     | 44 +++++++++++++++++++++++++++++++++--------
 7 files changed, 60 insertions(+), 19 deletions(-)

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 27a879eaa5a4e..1ecc67da6c1a4 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -414,7 +414,8 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
 					  afs_wake_up_async_call :
 					  afs_wake_up_call_waiter),
 					 call->upgrade,
-					 call->intr,
+					 (call->intr ? RXRPC_PREINTERRUPTIBLE :
+					  RXRPC_UNINTERRUPTIBLE),
 					 call->debug_id);
 	if (IS_ERR(rxcall)) {
 		ret = PTR_ERR(rxcall);
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index 299240df79e4a..04e97bab6f28b 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -16,6 +16,12 @@ struct sock;
 struct socket;
 struct rxrpc_call;
 
+enum rxrpc_interruptibility {
+	RXRPC_INTERRUPTIBLE,	/* Call is interruptible */
+	RXRPC_PREINTERRUPTIBLE,	/* Call can be cancelled whilst waiting for a slot */
+	RXRPC_UNINTERRUPTIBLE,	/* Call should not be interruptible at all */
+};
+
 /*
  * Debug ID counter for tracing.
  */
@@ -41,7 +47,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
 					   gfp_t,
 					   rxrpc_notify_rx_t,
 					   bool,
-					   bool,
+					   enum rxrpc_interruptibility,
 					   unsigned int);
 int rxrpc_kernel_send_data(struct socket *, struct rxrpc_call *,
 			   struct msghdr *, size_t,
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index bad0d6adcc49f..15ee92d795815 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -285,7 +285,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
 					   gfp_t gfp,
 					   rxrpc_notify_rx_t notify_rx,
 					   bool upgrade,
-					   bool intr,
+					   enum rxrpc_interruptibility interruptibility,
 					   unsigned int debug_id)
 {
 	struct rxrpc_conn_parameters cp;
@@ -310,7 +310,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
 	memset(&p, 0, sizeof(p));
 	p.user_call_ID = user_call_ID;
 	p.tx_total_len = tx_total_len;
-	p.intr = intr;
+	p.interruptibility = interruptibility;
 
 	memset(&cp, 0, sizeof(cp));
 	cp.local		= rx->local;
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 394d18857979a..3eb1ab40ca5cb 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -489,7 +489,6 @@ enum rxrpc_call_flag {
 	RXRPC_CALL_BEGAN_RX_TIMER,	/* We began the expect_rx_by timer */
 	RXRPC_CALL_RX_HEARD,		/* The peer responded at least once to this call */
 	RXRPC_CALL_RX_UNDERRUN,		/* Got data underrun */
-	RXRPC_CALL_IS_INTR,		/* The call is interruptible */
 	RXRPC_CALL_DISCONNECTED,	/* The call has been disconnected */
 };
 
@@ -598,6 +597,7 @@ struct rxrpc_call {
 	atomic_t		usage;
 	u16			service_id;	/* service ID */
 	u8			security_ix;	/* Security type */
+	enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
 	u32			call_id;	/* call ID on connection  */
 	u32			cid;		/* connection ID plus channel index */
 	int			debug_id;	/* debug ID for printks */
@@ -720,7 +720,7 @@ struct rxrpc_call_params {
 		u32		normal;		/* Max time since last call packet (msec) */
 	} timeouts;
 	u8			nr_timeouts;	/* Number of timeouts specified */
-	bool			intr;		/* The call is interruptible */
+	enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
 };
 
 struct rxrpc_send_params {
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index c9f34b0a11df4..f07970207b544 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -237,8 +237,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
 		return call;
 	}
 
-	if (p->intr)
-		__set_bit(RXRPC_CALL_IS_INTR, &call->flags);
+	call->interruptibility = p->interruptibility;
 	call->tx_total_len = p->tx_total_len;
 	trace_rxrpc_call(call->debug_id, rxrpc_call_new_client,
 			 atomic_read(&call->usage),
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index ea7d4c21f8893..f2a1a5dbb5a7b 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -655,13 +655,20 @@ static int rxrpc_wait_for_channel(struct rxrpc_call *call, gfp_t gfp)
 
 		add_wait_queue_exclusive(&call->waitq, &myself);
 		for (;;) {
-			if (test_bit(RXRPC_CALL_IS_INTR, &call->flags))
+			switch (call->interruptibility) {
+			case RXRPC_INTERRUPTIBLE:
+			case RXRPC_PREINTERRUPTIBLE:
 				set_current_state(TASK_INTERRUPTIBLE);
-			else
+				break;
+			case RXRPC_UNINTERRUPTIBLE:
+			default:
 				set_current_state(TASK_UNINTERRUPTIBLE);
+				break;
+			}
 			if (call->call_id)
 				break;
-			if (test_bit(RXRPC_CALL_IS_INTR, &call->flags) &&
+			if ((call->interruptibility == RXRPC_INTERRUPTIBLE ||
+			     call->interruptibility == RXRPC_PREINTERRUPTIBLE) &&
 			    signal_pending(current)) {
 				ret = -ERESTARTSYS;
 				break;
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index a13051d380973..1eccfb92c9e15 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -62,7 +62,7 @@ static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx,
  * Wait for space to appear in the Tx queue uninterruptibly, but with
  * a timeout of 2*RTT if no progress was made and a signal occurred.
  */
-static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
+static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx,
 					    struct rxrpc_call *call)
 {
 	rxrpc_seq_t tx_start, tx_win;
@@ -87,8 +87,7 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
 		if (call->state >= RXRPC_CALL_COMPLETE)
 			return call->error;
 
-		if (test_bit(RXRPC_CALL_IS_INTR, &call->flags) &&
-		    timeout == 0 &&
+		if (timeout == 0 &&
 		    tx_win == tx_start && signal_pending(current))
 			return -EINTR;
 
@@ -102,6 +101,26 @@ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
 	}
 }
 
+/*
+ * Wait for space to appear in the Tx queue uninterruptibly.
+ */
+static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
+					    struct rxrpc_call *call,
+					    long *timeo)
+{
+	for (;;) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (rxrpc_check_tx_space(call, NULL))
+			return 0;
+
+		if (call->state >= RXRPC_CALL_COMPLETE)
+			return call->error;
+
+		trace_rxrpc_transmit(call, rxrpc_transmit_wait);
+		*timeo = schedule_timeout(*timeo);
+	}
+}
+
 /*
  * wait for space to appear in the transmit/ACK window
  * - caller holds the socket locked
@@ -119,10 +138,19 @@ static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx,
 
 	add_wait_queue(&call->waitq, &myself);
 
-	if (waitall)
-		ret = rxrpc_wait_for_tx_window_nonintr(rx, call);
-	else
-		ret = rxrpc_wait_for_tx_window_intr(rx, call, timeo);
+	switch (call->interruptibility) {
+	case RXRPC_INTERRUPTIBLE:
+		if (waitall)
+			ret = rxrpc_wait_for_tx_window_waitall(rx, call);
+		else
+			ret = rxrpc_wait_for_tx_window_intr(rx, call, timeo);
+		break;
+	case RXRPC_PREINTERRUPTIBLE:
+	case RXRPC_UNINTERRUPTIBLE:
+	default:
+		ret = rxrpc_wait_for_tx_window_nonintr(rx, call, timeo);
+		break;
+	}
 
 	remove_wait_queue(&call->waitq, &myself);
 	set_current_state(TASK_RUNNING);
@@ -628,7 +656,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
 		.call.tx_total_len	= -1,
 		.call.user_call_ID	= 0,
 		.call.nr_timeouts	= 0,
-		.call.intr		= true,
+		.call.interruptibility	= RXRPC_INTERRUPTIBLE,
 		.abort_code		= 0,
 		.command		= RXRPC_CMD_SEND_DATA,
 		.exclusive		= false,
-- 
2.20.1

[PATCH AUTOSEL 5.5 15/35] rxrpc: Fix sendmsg(MSG_WAITALL) handling

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit 498b577660f08cef5d9e78e0ed6dcd4c0939e98c ]

Fix the handling of sendmsg() with MSG_WAITALL for userspace to round the
timeout for when a signal occurs up to at least two jiffies as a 1 jiffy
timeout may end up being effectively 0 if jiffies wraps at the wrong time.

Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/sendmsg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 1eccfb92c9e15..0fcf157aa09f8 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -71,8 +71,8 @@ static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx,
 
 	rtt = READ_ONCE(call->peer->rtt);
 	rtt2 = nsecs_to_jiffies64(rtt) * 2;
-	if (rtt2 < 1)
-		rtt2 = 1;
+	if (rtt2 < 2)
+		rtt2 = 2;
 
 	timeout = rtt2;
 	tx_start = READ_ONCE(call->tx_hard_ack);
-- 
2.20.1

[PATCH AUTOSEL 5.5 16/35] net: stmmac: platform: Fix misleading interrupt error msg

[Sasha Levin]

From: Markus Fuchs <mklntf@gmail.com>

[ Upstream commit fc191af1bb0d069dc7e981076e8b80af21f1e61d ]

Not every stmmac based platform makes use of the eth_wake_irq or eth_lpi
interrupts. Use the platform_get_irq_byname_optional variant for these
interrupts, so no error message is displayed, if they can't be found.
Rather print an information to hint something might be wrong to assist
debugging on platforms which use these interrupts.

Signed-off-by: Markus Fuchs <mklntf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index d10ac54bf385a..13fafd905db87 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -663,16 +663,22 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
 	 * In case the wake up interrupt is not passed from the platform
 	 * so the driver will continue to use the mac irq (ndev->irq)
 	 */
-	stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
+	stmmac_res->wol_irq =
+		platform_get_irq_byname_optional(pdev, "eth_wake_irq");
 	if (stmmac_res->wol_irq < 0) {
 		if (stmmac_res->wol_irq == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
+		dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n");
 		stmmac_res->wol_irq = stmmac_res->irq;
 	}
 
-	stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
-	if (stmmac_res->lpi_irq == -EPROBE_DEFER)
-		return -EPROBE_DEFER;
+	stmmac_res->lpi_irq =
+		platform_get_irq_byname_optional(pdev, "eth_lpi");
+	if (stmmac_res->lpi_irq < 0) {
+		if (stmmac_res->lpi_irq == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
+	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
-- 
2.20.1

[PATCH AUTOSEL 5.5 17/35] net: vxge: fix wrong __VA_ARGS__ usage

[Sasha Levin]

From: Zheng Wei <wei.zheng@vivo.com>

[ Upstream commit b317538c47943f9903860d83cc0060409e12d2ff ]

printk in macro vxge_debug_ll uses __VA_ARGS__ without "##" prefix,
it causes a build error when there is no variable
arguments(e.g. only fmt is specified.).

Signed-off-by: Zheng Wei <wei.zheng@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/neterion/vxge/vxge-config.h |  2 +-
 drivers/net/ethernet/neterion/vxge/vxge-main.h   | 14 +++++++-------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-config.h b/drivers/net/ethernet/neterion/vxge/vxge-config.h
index e678ba379598e..628fa9b2f7416 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-config.h
+++ b/drivers/net/ethernet/neterion/vxge/vxge-config.h
@@ -2045,7 +2045,7 @@ vxge_hw_vpath_strip_fcs_check(struct __vxge_hw_device *hldev, u64 vpath_mask);
 	if ((level >= VXGE_ERR && VXGE_COMPONENT_LL & VXGE_DEBUG_ERR_MASK) ||  \
 	    (level >= VXGE_TRACE && VXGE_COMPONENT_LL & VXGE_DEBUG_TRACE_MASK))\
 		if ((mask & VXGE_DEBUG_MASK) == mask)			       \
-			printk(fmt "\n", __VA_ARGS__);			       \
+			printk(fmt "\n", ##__VA_ARGS__);		       \
 } while (0)
 #else
 #define vxge_debug_ll(level, mask, fmt, ...)
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.h b/drivers/net/ethernet/neterion/vxge/vxge-main.h
index 59a57ff5e96af..9c86f4f9cd424 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.h
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.h
@@ -452,49 +452,49 @@ int vxge_fw_upgrade(struct vxgedev *vdev, char *fw_name, int override);
 
 #if (VXGE_DEBUG_LL_CONFIG & VXGE_DEBUG_MASK)
 #define vxge_debug_ll_config(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_LL_CONFIG, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_LL_CONFIG, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_ll_config(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_INIT & VXGE_DEBUG_MASK)
 #define vxge_debug_init(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_INIT, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_INIT, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_init(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_TX & VXGE_DEBUG_MASK)
 #define vxge_debug_tx(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_TX, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_TX, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_tx(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_RX & VXGE_DEBUG_MASK)
 #define vxge_debug_rx(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_RX, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_RX, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_rx(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_MEM & VXGE_DEBUG_MASK)
 #define vxge_debug_mem(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_MEM, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_MEM, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_mem(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_ENTRYEXIT & VXGE_DEBUG_MASK)
 #define vxge_debug_entryexit(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_ENTRYEXIT, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_ENTRYEXIT, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_entryexit(level, fmt, ...)
 #endif
 
 #if (VXGE_DEBUG_INTR & VXGE_DEBUG_MASK)
 #define vxge_debug_intr(level, fmt, ...) \
-	vxge_debug_ll(level, VXGE_DEBUG_INTR, fmt, __VA_ARGS__)
+	vxge_debug_ll(level, VXGE_DEBUG_INTR, fmt, ##__VA_ARGS__)
 #else
 #define vxge_debug_intr(level, fmt, ...)
 #endif
-- 
2.20.1

[PATCH AUTOSEL 5.5 20/35] hinic: fix a bug of waitting for IO stopped

[Sasha Levin]

From: Luo bin <luobin9@huawei.com>

[ Upstream commit 96758117dc528e6d84bd23d205e8cf7f31eda029 ]

it's unreliable for fw to check whether IO is stopped, so driver
wait for enough time to ensure IO process is done in hw before
freeing resources

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/ethernet/huawei/hinic/hinic_hw_dev.c  | 51 +------------------
 1 file changed, 2 insertions(+), 49 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
index 79b3d53f2fbfa..c7c75b772a866 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
@@ -360,50 +360,6 @@ static int wait_for_db_state(struct hinic_hwdev *hwdev)
 	return -EFAULT;
 }
 
-static int wait_for_io_stopped(struct hinic_hwdev *hwdev)
-{
-	struct hinic_cmd_io_status cmd_io_status;
-	struct hinic_hwif *hwif = hwdev->hwif;
-	struct pci_dev *pdev = hwif->pdev;
-	struct hinic_pfhwdev *pfhwdev;
-	unsigned long end;
-	u16 out_size;
-	int err;
-
-	if (!HINIC_IS_PF(hwif) && !HINIC_IS_PPF(hwif)) {
-		dev_err(&pdev->dev, "Unsupported PCI Function type\n");
-		return -EINVAL;
-	}
-
-	pfhwdev = container_of(hwdev, struct hinic_pfhwdev, hwdev);
-
-	cmd_io_status.func_idx = HINIC_HWIF_FUNC_IDX(hwif);
-
-	end = jiffies + msecs_to_jiffies(IO_STATUS_TIMEOUT);
-	do {
-		err = hinic_msg_to_mgmt(&pfhwdev->pf_to_mgmt, HINIC_MOD_COMM,
-					HINIC_COMM_CMD_IO_STATUS_GET,
-					&cmd_io_status, sizeof(cmd_io_status),
-					&cmd_io_status, &out_size,
-					HINIC_MGMT_MSG_SYNC);
-		if ((err) || (out_size != sizeof(cmd_io_status))) {
-			dev_err(&pdev->dev, "Failed to get IO status, ret = %d\n",
-				err);
-			return err;
-		}
-
-		if (cmd_io_status.status == IO_STOPPED) {
-			dev_info(&pdev->dev, "IO stopped\n");
-			return 0;
-		}
-
-		msleep(20);
-	} while (time_before(jiffies, end));
-
-	dev_err(&pdev->dev, "Wait for IO stopped - Timeout\n");
-	return -ETIMEDOUT;
-}
-
 /**
  * clear_io_resource - set the IO resources as not active in the NIC
  * @hwdev: the NIC HW device
@@ -423,11 +379,8 @@ static int clear_io_resources(struct hinic_hwdev *hwdev)
 		return -EINVAL;
 	}
 
-	err = wait_for_io_stopped(hwdev);
-	if (err) {
-		dev_err(&pdev->dev, "IO has not stopped yet\n");
-		return err;
-	}
+	/* sleep 100ms to wait for firmware stopping I/O */
+	msleep(100);
 
 	cmd_clear_io_res.func_idx = HINIC_HWIF_FUNC_IDX(hwif);
 
-- 
2.20.1

[PATCH AUTOSEL 5.5 21/35] hinic: fix the bug of clearing event queue

[Sasha Levin]

From: Luo bin <luobin9@huawei.com>

[ Upstream commit 614eaa943e9fc3fcdbd4aa0692ae84973d363333 ]

should disable eq irq before freeing it, must clear event queue
depth in hw before freeing relevant memory to avoid illegal
memory access and update consumer idx to avoid invalid interrupt

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/ethernet/huawei/hinic/hinic_hw_eqs.c  | 24 +++++++++++++------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
index 79243b626ddbe..6a723c4757bce 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
@@ -188,7 +188,7 @@ static u8 eq_cons_idx_checksum_set(u32 val)
  * eq_update_ci - update the HW cons idx of event queue
  * @eq: the event queue to update the cons idx for
  **/
-static void eq_update_ci(struct hinic_eq *eq)
+static void eq_update_ci(struct hinic_eq *eq, u32 arm_state)
 {
 	u32 val, addr = EQ_CONS_IDX_REG_ADDR(eq);
 
@@ -202,7 +202,7 @@ static void eq_update_ci(struct hinic_eq *eq)
 
 	val |= HINIC_EQ_CI_SET(eq->cons_idx, IDX)    |
 	       HINIC_EQ_CI_SET(eq->wrapped, WRAPPED) |
-	       HINIC_EQ_CI_SET(EQ_ARMED, INT_ARMED);
+	       HINIC_EQ_CI_SET(arm_state, INT_ARMED);
 
 	val |= HINIC_EQ_CI_SET(eq_cons_idx_checksum_set(val), XOR_CHKSUM);
 
@@ -347,7 +347,7 @@ static void eq_irq_handler(void *data)
 	else if (eq->type == HINIC_CEQ)
 		ceq_irq_handler(eq);
 
-	eq_update_ci(eq);
+	eq_update_ci(eq, EQ_ARMED);
 }
 
 /**
@@ -702,7 +702,7 @@ static int init_eq(struct hinic_eq *eq, struct hinic_hwif *hwif,
 	}
 
 	set_eq_ctrls(eq);
-	eq_update_ci(eq);
+	eq_update_ci(eq, EQ_ARMED);
 
 	err = alloc_eq_pages(eq);
 	if (err) {
@@ -752,18 +752,28 @@ static int init_eq(struct hinic_eq *eq, struct hinic_hwif *hwif,
  **/
 static void remove_eq(struct hinic_eq *eq)
 {
-	struct msix_entry *entry = &eq->msix_entry;
-
-	free_irq(entry->vector, eq);
+	hinic_set_msix_state(eq->hwif, eq->msix_entry.entry,
+			     HINIC_MSIX_DISABLE);
+	free_irq(eq->msix_entry.vector, eq);
 
 	if (eq->type == HINIC_AEQ) {
 		struct hinic_eq_work *aeq_work = &eq->aeq_work;
 
 		cancel_work_sync(&aeq_work->work);
+		/* clear aeq_len to avoid hw access host memory */
+		hinic_hwif_write_reg(eq->hwif,
+				     HINIC_CSR_AEQ_CTRL_1_ADDR(eq->q_id), 0);
 	} else if (eq->type == HINIC_CEQ) {
 		tasklet_kill(&eq->ceq_tasklet);
+		/* clear ceq_len to avoid hw access host memory */
+		hinic_hwif_write_reg(eq->hwif,
+				     HINIC_CSR_CEQ_CTRL_1_ADDR(eq->q_id), 0);
 	}
 
+	/* update cons_idx to avoid invalid interrupt */
+	eq->cons_idx = hinic_hwif_read_reg(eq->hwif, EQ_PROD_IDX_REG_ADDR(eq));
+	eq_update_ci(eq, EQ_NOT_ARMED);
+
 	free_eq_pages(eq);
 }
 
-- 
2.20.1

[PATCH AUTOSEL 5.5 22/35] hinic: fix out-of-order excution in arm cpu

[Sasha Levin]

From: Luo bin <luobin9@huawei.com>

[ Upstream commit 33f15da216a1f4566b4ec880942556ace30615df ]

add read barrier in driver code to keep from reading other fileds
in dma memory which is writable for hw until we have verified the
memory is valid for driver

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c | 2 ++
 drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c  | 2 ++
 drivers/net/ethernet/huawei/hinic/hinic_rx.c      | 3 +++
 drivers/net/ethernet/huawei/hinic/hinic_tx.c      | 2 ++
 4 files changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
index eb53c15b13f33..33f93cc25193a 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
@@ -623,6 +623,8 @@ static int cmdq_cmd_ceq_handler(struct hinic_cmdq *cmdq, u16 ci,
 	if (!CMDQ_WQE_COMPLETED(be32_to_cpu(ctrl->ctrl_info)))
 		return -EBUSY;
 
+	dma_rmb();
+
 	errcode = CMDQ_WQE_ERRCODE_GET(be32_to_cpu(status->status_info), VAL);
 
 	cmdq_sync_cmd_handler(cmdq, ci, errcode);
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
index 6a723c4757bce..c0b6bcb067cd4 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c
@@ -235,6 +235,8 @@ static void aeq_irq_handler(struct hinic_eq *eq)
 		if (HINIC_EQ_ELEM_DESC_GET(aeqe_desc, WRAPPED) == eq->wrapped)
 			break;
 
+		dma_rmb();
+
 		event = HINIC_EQ_ELEM_DESC_GET(aeqe_desc, TYPE);
 		if (event >= HINIC_MAX_AEQ_EVENTS) {
 			dev_err(&pdev->dev, "Unknown AEQ Event %d\n", event);
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
index 2695ad69fca60..815649e37cb15 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
@@ -350,6 +350,9 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
 		if (!rq_wqe)
 			break;
 
+		/* make sure we read rx_done before packet length */
+		dma_rmb();
+
 		cqe = rq->cqe[ci];
 		status =  be32_to_cpu(cqe->status);
 		hinic_rq_get_sge(rxq->rq, rq_wqe, ci, &sge);
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_tx.c b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
index 0e13d1c7e4746..375d81d03e866 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_tx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
@@ -622,6 +622,8 @@ static int free_tx_poll(struct napi_struct *napi, int budget)
 	do {
 		hw_ci = HW_CONS_IDX(sq) & wq->mask;
 
+		dma_rmb();
+
 		/* Reading a WQEBB to get real WQE size and consumer index. */
 		sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &sw_ci);
 		if ((!sq_wqe) ||
-- 
2.20.1

[PATCH AUTOSEL 5.5 23/35] hinic: fix wrong para of wait_for_completion_timeout

[Sasha Levin]

From: Luo bin <luobin9@huawei.com>

[ Upstream commit 0da7c322f116210ebfdda59c7da663a6fc5e9cc8 ]

the second input parameter of wait_for_completion_timeout should
be jiffies instead of millisecond

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c | 3 ++-
 drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
index 33f93cc25193a..5f2d57d1b2d37 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
@@ -389,7 +389,8 @@ static int cmdq_sync_cmd_direct_resp(struct hinic_cmdq *cmdq,
 
 	spin_unlock_bh(&cmdq->cmdq_lock);
 
-	if (!wait_for_completion_timeout(&done, CMDQ_TIMEOUT)) {
+	if (!wait_for_completion_timeout(&done,
+					 msecs_to_jiffies(CMDQ_TIMEOUT))) {
 		spin_lock_bh(&cmdq->cmdq_lock);
 
 		if (cmdq->errcode[curr_prod_idx] == &errcode)
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
index c1a6be6bf6a8c..8995e32dd1c00 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
@@ -43,7 +43,7 @@
 
 #define MSG_NOT_RESP                    0xFFFF
 
-#define MGMT_MSG_TIMEOUT                1000
+#define MGMT_MSG_TIMEOUT                5000
 
 #define mgmt_to_pfhwdev(pf_mgmt)        \
 		container_of(pf_mgmt, struct hinic_pfhwdev, pf_to_mgmt)
@@ -267,7 +267,8 @@ static int msg_to_mgmt_sync(struct hinic_pf_to_mgmt *pf_to_mgmt,
 		goto unlock_sync_msg;
 	}
 
-	if (!wait_for_completion_timeout(recv_done, MGMT_MSG_TIMEOUT)) {
+	if (!wait_for_completion_timeout(recv_done,
+					 msecs_to_jiffies(MGMT_MSG_TIMEOUT))) {
 		dev_err(&pdev->dev, "MGMT timeout, MSG id = %d\n", msg_id);
 		err = -ETIMEDOUT;
 		goto unlock_sync_msg;
-- 
2.20.1

[PATCH AUTOSEL 5.5 24/35] hinic: fix wrong value of MIN_SKB_LEN

[Sasha Levin]

From: Luo bin <luobin9@huawei.com>

[ Upstream commit 7296695fc16dd1761dbba8b68a9181c71cef0633 ]

the minimum value of skb len that hw supports is 32 rather than 17

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/huawei/hinic/hinic_tx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_tx.c b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
index 375d81d03e866..365016450bdbe 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_tx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
@@ -45,7 +45,7 @@
 
 #define HW_CONS_IDX(sq)                 be16_to_cpu(*(u16 *)((sq)->hw_ci_addr))
 
-#define MIN_SKB_LEN                     17
+#define MIN_SKB_LEN			32
 
 #define	MAX_PAYLOAD_OFFSET	        221
 #define TRANSPORT_OFFSET(l4_hdr, skb)	((u32)((l4_hdr) - (skb)->data))
-- 
2.20.1

[PATCH AUTOSEL 5.5 25/35] selftests/net: add definition for SOL_DCCP to fix compilation errors for old libc

[Sasha Levin]

From: Alan Maguire <alan.maguire@oracle.com>

[ Upstream commit 83a9b6f639e9f6b632337f9776de17d51d969c77 ]

Many systems build/test up-to-date kernels with older libcs, and
an older glibc (2.17) lacks the definition of SOL_DCCP in
/usr/include/bits/socket.h (it was added in the 4.6 timeframe).

Adding the definition to the test program avoids a compilation
failure that gets in the way of building tools/testing/selftests/net.
The test itself will work once the definition is added; either
skipping due to DCCP not being configured in the kernel under test
or passing, so there are no other more up-to-date glibc dependencies
here it seems beyond that missing definition.

Fixes: 11fb60d1089f ("selftests: net: reuseport_addr_any: add DCCP")
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/net/reuseport_addr_any.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/net/reuseport_addr_any.c b/tools/testing/selftests/net/reuseport_addr_any.c
index c6233935fed14..b8475cb29be7a 100644
--- a/tools/testing/selftests/net/reuseport_addr_any.c
+++ b/tools/testing/selftests/net/reuseport_addr_any.c
@@ -21,6 +21,10 @@
 #include <sys/socket.h>
 #include <unistd.h>
 
+#ifndef SOL_DCCP
+#define SOL_DCCP 269
+#endif
+
 static const char *IP4_ADDR = "127.0.0.1";
 static const char *IP6_ADDR = "::1";
 static const char *IP4_MAPPED6 = "::ffff:127.0.0.1";
-- 
2.20.1

[PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Sasha Levin]

From: Pablo Neira Ayuso <pablo@netfilter.org>

[ Upstream commit 8c2d45b2b65ca1f215244be1c600236e83f9815f ]

Currently, the -EEXIST return code of ->insert() callbacks is ambiguous: it
might indicate that a given element (including intervals) already exists as
such, or that the new element would clash with existing ones.

If identical elements already exist, the front-end is ignoring this without
returning error, in case NLM_F_EXCL is not set. However, if the new element
can't be inserted due an overlap, we should report this to the user.

To this purpose, allow set back-ends to return -ENOTEMPTY on collision with
existing elements, translate that to -EEXIST, and return that to userspace,
no matter if NLM_F_EXCL was set.

Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nf_tables_api.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 11a2a7b5312ee..a9f6bace16245 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4957,6 +4957,11 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 				err = -EBUSY;
 			else if (!(nlmsg_flags & NLM_F_EXCL))
 				err = 0;
+		} else if (err == -ENOTEMPTY) {
+			/* ENOTEMPTY reports overlapping between this element
+			 * and an existing one.
+			 */
+			err = -EEXIST;
 		}
 		goto err5;
 	}
-- 
2.20.1

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Stefano Brivio]

Hi Sasha,

On Mon,  6 Apr 2020 20:00:49 -0400
Sasha Levin <sashal@kernel.org> wrote:

> From: Pablo Neira Ayuso <pablo@netfilter.org>
> 
> [ Upstream commit 8c2d45b2b65ca1f215244be1c600236e83f9815f ]

This patch, together with 28/35 and 29/35 in this series, and all the
equivalent patches for 5.4 and 4.19, that is:
	[PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
	[PATCH AUTOSEL 5.5 28/35] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
	[PATCH AUTOSEL 5.5 29/35] netfilter: nft_set_rbtree: Detect partial overlaps on insertion
	[PATCH AUTOSEL 5.4 24/32] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
	[PATCH AUTOSEL 5.4 25/32] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
	[PATCH AUTOSEL 5.4 26/32] netfilter: nft_set_rbtree: Detect partial overlaps on insertion
	[PATCH AUTOSEL 4.19 08/13] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
	[PATCH AUTOSEL 4.19 09/13] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
	[PATCH AUTOSEL 4.19 10/13] netfilter: nft_set_rbtree: Detect partial overlaps on insertion

should only be backported together with nf.git commit
	72239f2795fa ("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection on insertion")

as they would otherwise introduce a regression. In general, those changes
are not really relevant before 5.6, as nft_set_pipapo wasn't there and the
main purpose here is to make the nft_set_rbtree back-end consistent with it:
they also prevent a malfunction in nft_set_rbtree itself, but nothing that
would be triggered using 'nft' alone, and no memory badnesses or critical
issues whatsoever. So it's also safe to drop them, in my opinion.

Also patches for 4.14 and 4.9:
	[PATCH AUTOSEL 4.14 6/9] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
	[PATCH AUTOSEL 4.9 3/5] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

can safely be dropped, because there are no set back-ends there, without
the following patches, that use this way of reporting a partial overlap.

I'm used to not Cc: stable on networking patches (Dave's net.git),
but I guess I should instead if they go through nf.git (Pablo's tree),
right?

-- 
Stefano

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Sasha Levin]

On Tue, Apr 07, 2020 at 02:18:48AM +0200, Stefano Brivio wrote:
>Hi Sasha,
>
>On Mon,  6 Apr 2020 20:00:49 -0400
>Sasha Levin <sashal@kernel.org> wrote:
>
>> From: Pablo Neira Ayuso <pablo@netfilter.org>
>>
>> [ Upstream commit 8c2d45b2b65ca1f215244be1c600236e83f9815f ]
>
>This patch, together with 28/35 and 29/35 in this series, and all the
>equivalent patches for 5.4 and 4.19, that is:
>	[PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
>	[PATCH AUTOSEL 5.5 28/35] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
>	[PATCH AUTOSEL 5.5 29/35] netfilter: nft_set_rbtree: Detect partial overlaps on insertion
>	[PATCH AUTOSEL 5.4 24/32] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
>	[PATCH AUTOSEL 5.4 25/32] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
>	[PATCH AUTOSEL 5.4 26/32] netfilter: nft_set_rbtree: Detect partial overlaps on insertion
>	[PATCH AUTOSEL 4.19 08/13] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
>	[PATCH AUTOSEL 4.19 09/13] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
>	[PATCH AUTOSEL 4.19 10/13] netfilter: nft_set_rbtree: Detect partial overlaps on insertion
>
>should only be backported together with nf.git commit
>	72239f2795fa ("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection on insertion")
>
>as they would otherwise introduce a regression. In general, those changes
>are not really relevant before 5.6, as nft_set_pipapo wasn't there and the
>main purpose here is to make the nft_set_rbtree back-end consistent with it:
>they also prevent a malfunction in nft_set_rbtree itself, but nothing that
>would be triggered using 'nft' alone, and no memory badnesses or critical
>issues whatsoever. So it's also safe to drop them, in my opinion.
>
>Also patches for 4.14 and 4.9:
>	[PATCH AUTOSEL 4.14 6/9] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
>	[PATCH AUTOSEL 4.9 3/5] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion
>
>can safely be dropped, because there are no set back-ends there, without
>the following patches, that use this way of reporting a partial overlap.

I've just dropped them all as 72239f2795fa ("netfilter: nft_set_rbtree:
Drop spurious condition for overlap detection on insertion") didn't make
it into Linus's tree yet.

>I'm used to not Cc: stable on networking patches (Dave's net.git),
>but I guess I should instead if they go through nf.git (Pablo's tree),
>right?

Yup, this confusion has caused for quite a few netfilter fixes to not
land in -stable. If it goes through Pablo's tree (and unless he intructs
otherwise), you should Cc stable.

-- 
Thanks,
Sasha

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Stefano Brivio]

On Mon, 13 Apr 2020 12:39:00 -0400
Sasha Levin <sashal@kernel.org> wrote:

> On Tue, Apr 07, 2020 at 02:18:48AM +0200, Stefano Brivio wrote:
>
> >I'm used to not Cc: stable on networking patches (Dave's net.git),
> >but I guess I should instead if they go through nf.git (Pablo's tree),
> >right?  
> 
> Yup, this confusion has caused for quite a few netfilter fixes to not
> land in -stable. If it goes through Pablo's tree (and unless he intructs
> otherwise), you should Cc stable.

Hah, thanks for clarifying.

What do you think I should do specifically with 72239f2795fa
("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection
on insertion")?

I haven't Cc'ed stable on that one. Can I expect AUTOSEL to pick it up
anyway?

-- 
Stefano

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Sasha Levin]

On Mon, Apr 13, 2020 at 10:38:58PM +0200, Stefano Brivio wrote:
>On Mon, 13 Apr 2020 12:39:00 -0400
>Sasha Levin <sashal@kernel.org> wrote:
>
>> On Tue, Apr 07, 2020 at 02:18:48AM +0200, Stefano Brivio wrote:
>>
>> >I'm used to not Cc: stable on networking patches (Dave's net.git),
>> >but I guess I should instead if they go through nf.git (Pablo's tree),
>> >right?
>>
>> Yup, this confusion has caused for quite a few netfilter fixes to not
>> land in -stable. If it goes through Pablo's tree (and unless he intructs
>> otherwise), you should Cc stable.
>
>Hah, thanks for clarifying.
>
>What do you think I should do specifically with 72239f2795fa
>("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection
>on insertion")?
>
>I haven't Cc'ed stable on that one. Can I expect AUTOSEL to pick it up
>anyway?

I'll make sure it gets queued up when it hits Linus's tree :)

-- 
Thanks,
Sasha

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Pablo Neira Ayuso]

Hi Sasha,

On Tue, Apr 14, 2020 at 11:08:40AM -0400, Sasha Levin wrote:
> On Mon, Apr 13, 2020 at 10:38:58PM +0200, Stefano Brivio wrote:
> > On Mon, 13 Apr 2020 12:39:00 -0400
> > Sasha Levin <sashal@kernel.org> wrote:
> > 
> > > On Tue, Apr 07, 2020 at 02:18:48AM +0200, Stefano Brivio wrote:
> > > 
> > > >I'm used to not Cc: stable on networking patches (Dave's net.git),
> > > >but I guess I should instead if they go through nf.git (Pablo's tree),
> > > >right?
> > > 
> > > Yup, this confusion has caused for quite a few netfilter fixes to not
> > > land in -stable. If it goes through Pablo's tree (and unless he intructs
> > > otherwise), you should Cc stable.
> > 
> > Hah, thanks for clarifying.
> > 
> > What do you think I should do specifically with 72239f2795fa
> > ("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection
> > on insertion")?
> > 
> > I haven't Cc'ed stable on that one. Can I expect AUTOSEL to pick it up
> > anyway?
> 
> I'll make sure it gets queued up when it hits Linus's tree :)

5.6.6 is out and this fix is still not included...

Would you please enqueue...

commit 72239f2795fab9a58633bd0399698ff7581534a3
Author: Stefano Brivio <sbrivio@redhat.com>
Date:   Wed Apr 1 17:14:38 2020 +0200

    netfilter: nft_set_rbtree: Drop spurious condition for overlap detection on insertion

for 5.6.x -stable ?

Thank you very much.

Re: [PATCH AUTOSEL 5.5 27/35] netfilter: nf_tables: Allow set back-ends to report partial overlaps on insertion

[Greg KH]

On Tue, Apr 21, 2020 at 01:32:21PM +0200, Pablo Neira Ayuso wrote:
> Hi Sasha,
> 
> On Tue, Apr 14, 2020 at 11:08:40AM -0400, Sasha Levin wrote:
> > On Mon, Apr 13, 2020 at 10:38:58PM +0200, Stefano Brivio wrote:
> > > On Mon, 13 Apr 2020 12:39:00 -0400
> > > Sasha Levin <sashal@kernel.org> wrote:
> > > 
> > > > On Tue, Apr 07, 2020 at 02:18:48AM +0200, Stefano Brivio wrote:
> > > > 
> > > > >I'm used to not Cc: stable on networking patches (Dave's net.git),
> > > > >but I guess I should instead if they go through nf.git (Pablo's tree),
> > > > >right?
> > > > 
> > > > Yup, this confusion has caused for quite a few netfilter fixes to not
> > > > land in -stable. If it goes through Pablo's tree (and unless he intructs
> > > > otherwise), you should Cc stable.
> > > 
> > > Hah, thanks for clarifying.
> > > 
> > > What do you think I should do specifically with 72239f2795fa
> > > ("netfilter: nft_set_rbtree: Drop spurious condition for overlap detection
> > > on insertion")?
> > > 
> > > I haven't Cc'ed stable on that one. Can I expect AUTOSEL to pick it up
> > > anyway?
> > 
> > I'll make sure it gets queued up when it hits Linus's tree :)
> 
> 5.6.6 is out and this fix is still not included...
> 
> Would you please enqueue...
> 
> commit 72239f2795fab9a58633bd0399698ff7581534a3
> Author: Stefano Brivio <sbrivio@redhat.com>
> Date:   Wed Apr 1 17:14:38 2020 +0200
> 
>     netfilter: nft_set_rbtree: Drop spurious condition for overlap detection on insertion
> 
> for 5.6.x -stable ?

Now queued up, thanks.

greg k-h

[PATCH AUTOSEL 5.5 28/35] netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()

[Sasha Levin]

From: Stefano Brivio <sbrivio@redhat.com>

[ Upstream commit 6f7c9caf017be8ab0fe3b99509580d0793bf0833 ]

Replace negations of nft_rbtree_interval_end() with a new helper,
nft_rbtree_interval_start(), wherever this helps to visualise the
problem at hand, that is, for all the occurrences except for the
comparison against given flags in __nft_rbtree_get().

This gets especially useful in the next patch.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nft_set_rbtree.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index a9f804f7a04ac..95fcba34bfd35 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -33,6 +33,11 @@ static bool nft_rbtree_interval_end(const struct nft_rbtree_elem *rbe)
 	       (*nft_set_ext_flags(&rbe->ext) & NFT_SET_ELEM_INTERVAL_END);
 }
 
+static bool nft_rbtree_interval_start(const struct nft_rbtree_elem *rbe)
+{
+	return !nft_rbtree_interval_end(rbe);
+}
+
 static bool nft_rbtree_equal(const struct nft_set *set, const void *this,
 			     const struct nft_rbtree_elem *interval)
 {
@@ -64,7 +69,7 @@ static bool __nft_rbtree_lookup(const struct net *net, const struct nft_set *set
 			if (interval &&
 			    nft_rbtree_equal(set, this, interval) &&
 			    nft_rbtree_interval_end(rbe) &&
-			    !nft_rbtree_interval_end(interval))
+			    nft_rbtree_interval_start(interval))
 				continue;
 			interval = rbe;
 		} else if (d > 0)
@@ -89,7 +94,7 @@ static bool __nft_rbtree_lookup(const struct net *net, const struct nft_set *set
 
 	if (set->flags & NFT_SET_INTERVAL && interval != NULL &&
 	    nft_set_elem_active(&interval->ext, genmask) &&
-	    !nft_rbtree_interval_end(interval)) {
+	    nft_rbtree_interval_start(interval)) {
 		*ext = &interval->ext;
 		return true;
 	}
@@ -224,9 +229,9 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 			p = &parent->rb_right;
 		else {
 			if (nft_rbtree_interval_end(rbe) &&
-			    !nft_rbtree_interval_end(new)) {
+			    nft_rbtree_interval_start(new)) {
 				p = &parent->rb_left;
-			} else if (!nft_rbtree_interval_end(rbe) &&
+			} else if (nft_rbtree_interval_start(rbe) &&
 				   nft_rbtree_interval_end(new)) {
 				p = &parent->rb_right;
 			} else if (nft_set_elem_active(&rbe->ext, genmask)) {
@@ -317,10 +322,10 @@ static void *nft_rbtree_deactivate(const struct net *net,
 			parent = parent->rb_right;
 		else {
 			if (nft_rbtree_interval_end(rbe) &&
-			    !nft_rbtree_interval_end(this)) {
+			    nft_rbtree_interval_start(this)) {
 				parent = parent->rb_left;
 				continue;
-			} else if (!nft_rbtree_interval_end(rbe) &&
+			} else if (nft_rbtree_interval_start(rbe) &&
 				   nft_rbtree_interval_end(this)) {
 				parent = parent->rb_right;
 				continue;
-- 
2.20.1

[PATCH AUTOSEL 5.5 29/35] netfilter: nft_set_rbtree: Detect partial overlaps on insertion

[Sasha Levin]

From: Stefano Brivio <sbrivio@redhat.com>

[ Upstream commit 7c84d41416d836ef7e533bd4d64ccbdf40c5ac70 ]

...and return -ENOTEMPTY to the front-end in this case, instead of
proceeding. Currently, nft takes care of checking for these cases
and not sending them to the kernel, but if we drop the set_overlap()
call in nft we can end up in situations like:

 # nft add table t
 # nft add set t s '{ type inet_service ; flags interval ; }'
 # nft add element t s '{ 1 - 5 }'
 # nft add element t s '{ 6 - 10 }'
 # nft add element t s '{ 4 - 7 }'
 # nft list set t s
 table ip t {
 	set s {
 		type inet_service
 		flags interval
 		elements = { 1-3, 4-5, 6-7 }
 	}
 }

This change has the primary purpose of making the behaviour
consistent with nft_set_pipapo, but is also functional to avoid
inconsistent behaviour if userspace sends overlapping elements for
any reason.

v2: When we meet the same key data in the tree, as start element while
    inserting an end element, or as end element while inserting a start
    element, actually check that the existing element is active, before
    resetting the overlap flag (Pablo Neira Ayuso)

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nft_set_rbtree.c | 70 ++++++++++++++++++++++++++++++++--
 1 file changed, 67 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index 95fcba34bfd35..996fd9dc6160c 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -213,8 +213,43 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 	u8 genmask = nft_genmask_next(net);
 	struct nft_rbtree_elem *rbe;
 	struct rb_node *parent, **p;
+	bool overlap = false;
 	int d;
 
+	/* Detect overlaps as we descend the tree. Set the flag in these cases:
+	 *
+	 * a1. |__ _ _?  >|__ _ _  (insert start after existing start)
+	 * a2. _ _ __>|  ?_ _ __|  (insert end before existing end)
+	 * a3. _ _ ___|  ?_ _ _>|  (insert end after existing end)
+	 * a4. >|__ _ _   _ _ __|  (insert start before existing end)
+	 *
+	 * and clear it later on, as we eventually reach the points indicated by
+	 * '?' above, in the cases described below. We'll always meet these
+	 * later, locally, due to tree ordering, and overlaps for the intervals
+	 * that are the closest together are always evaluated last.
+	 *
+	 * b1. |__ _ _!  >|__ _ _  (insert start after existing end)
+	 * b2. _ _ __>|  !_ _ __|  (insert end before existing start)
+	 * b3. !_____>|            (insert end after existing start)
+	 *
+	 * Case a4. resolves to b1.:
+	 * - if the inserted start element is the leftmost, because the '0'
+	 *   element in the tree serves as end element
+	 * - otherwise, if an existing end is found. Note that end elements are
+	 *   always inserted after corresponding start elements.
+	 *
+	 * For a new, rightmost pair of elements, we'll hit cases b1. and b3.,
+	 * in that order.
+	 *
+	 * The flag is also cleared in two special cases:
+	 *
+	 * b4. |__ _ _!|<_ _ _   (insert start right before existing end)
+	 * b5. |__ _ >|!__ _ _   (insert end right after existing start)
+	 *
+	 * which always happen as last step and imply that no further
+	 * overlapping is possible.
+	 */
+
 	parent = NULL;
 	p = &priv->root.rb_node;
 	while (*p != NULL) {
@@ -223,17 +258,42 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 		d = memcmp(nft_set_ext_key(&rbe->ext),
 			   nft_set_ext_key(&new->ext),
 			   set->klen);
-		if (d < 0)
+		if (d < 0) {
 			p = &parent->rb_left;
-		else if (d > 0)
+
+			if (nft_rbtree_interval_start(new)) {
+				overlap = nft_rbtree_interval_start(rbe) &&
+					  nft_set_elem_active(&rbe->ext,
+							      genmask);
+			} else {
+				overlap = nft_rbtree_interval_end(rbe) &&
+					  nft_set_elem_active(&rbe->ext,
+							      genmask);
+			}
+		} else if (d > 0) {
 			p = &parent->rb_right;
-		else {
+
+			if (nft_rbtree_interval_end(new)) {
+				overlap = nft_rbtree_interval_end(rbe) &&
+					  nft_set_elem_active(&rbe->ext,
+							      genmask);
+			} else if (nft_rbtree_interval_end(rbe) &&
+				   nft_set_elem_active(&rbe->ext, genmask)) {
+				overlap = true;
+			}
+		} else {
 			if (nft_rbtree_interval_end(rbe) &&
 			    nft_rbtree_interval_start(new)) {
 				p = &parent->rb_left;
+
+				if (nft_set_elem_active(&rbe->ext, genmask))
+					overlap = false;
 			} else if (nft_rbtree_interval_start(rbe) &&
 				   nft_rbtree_interval_end(new)) {
 				p = &parent->rb_right;
+
+				if (nft_set_elem_active(&rbe->ext, genmask))
+					overlap = false;
 			} else if (nft_set_elem_active(&rbe->ext, genmask)) {
 				*ext = &rbe->ext;
 				return -EEXIST;
@@ -242,6 +302,10 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 			}
 		}
 	}
+
+	if (overlap)
+		return -ENOTEMPTY;
+
 	rb_link_node_rcu(&new->node, parent, p);
 	rb_insert_color(&new->node, &priv->root);
 	return 0;
-- 
2.20.1

[PATCH AUTOSEL 5.5 30/35] cxgb4/ptp: pass the sign of offset delta in FW CMD

[Sasha Levin]

From: Raju Rangoju <rajur@chelsio.com>

[ Upstream commit 50e0d28d3808146cc19b0d5564ef4ba9e5bf3846 ]

cxgb4_ptp_fineadjtime() doesn't pass the signedness of offset delta
in FW_PTP_CMD. Fix it by passing correct sign.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
index 58a039c3224ad..af1f40cbccc88 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c
@@ -246,6 +246,9 @@ static int  cxgb4_ptp_fineadjtime(struct adapter *adapter, s64 delta)
 			     FW_PTP_CMD_PORTID_V(0));
 	c.retval_len16 = cpu_to_be32(FW_CMD_LEN16_V(sizeof(c) / 16));
 	c.u.ts.sc = FW_PTP_SC_ADJ_FTIME;
+	c.u.ts.sign = (delta < 0) ? 1 : 0;
+	if (delta < 0)
+		delta = -delta;
 	c.u.ts.tm = cpu_to_be64(delta);
 
 	err = t4_wr_mbox(adapter, adapter->mbox, &c, sizeof(c), NULL);
-- 
2.20.1

[PATCH AUTOSEL 5.5 32/35] cfg80211: Do not warn on same channel at the end of CSA

[Sasha Levin]

From: Ilan Peer <ilan.peer@intel.com>

[ Upstream commit 05dcb8bb258575a8dd3499d0d78bd2db633c2b23 ]

When cfg80211_update_assoc_bss_entry() is called, there is a
verification that the BSS channel actually changed. As some APs use
CSA also for bandwidth changes, this would result with a kernel
warning.

Fix this by removing the WARN_ON().

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200326150855.96316ada0e8d.I6710376b1b4257e5f4712fc7ab16e2b638d512aa@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/wireless/scan.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index aef240fdf8df6..328402ab64a3f 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -2022,7 +2022,11 @@ void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev,
 
 	spin_lock_bh(&rdev->bss_lock);
 
-	if (WARN_ON(cbss->pub.channel == chan))
+	/*
+	 * Some APs use CSA also for bandwidth changes, i.e., without actually
+	 * changing the control channel, so no need to update in such a case.
+	 */
+	if (cbss->pub.channel == chan)
 		goto done;
 
 	/* use transmitting bss */
-- 
2.20.1

[PATCH AUTOSEL 5.5 33/35] qlcnic: Fix bad kzalloc null test

[Sasha Levin]

From: Xu Wang <vulab@iscas.ac.cn>

[ Upstream commit bcaeb886ade124331a6f3a5cef34a3f1484c0a03 ]

In qlcnic_83xx_get_reset_instruction_template, the variable
of null test is bad, so correct it.

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c
index 07f9067affc65..cda5b0a9e9489 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c
@@ -1720,7 +1720,7 @@ static int qlcnic_83xx_get_reset_instruction_template(struct qlcnic_adapter *p_d
 
 	ahw->reset.seq_error = 0;
 	ahw->reset.buff = kzalloc(QLC_83XX_RESTART_TEMPLATE_SIZE, GFP_KERNEL);
-	if (p_dev->ahw->reset.buff == NULL)
+	if (ahw->reset.buff == NULL)
 		return -ENOMEM;
 
 	p_buff = p_dev->ahw->reset.buff;
-- 
2.20.1