Patch "iwlwifi: mvm: bail out if CTDP start operation fails" has been added to the 4.8-stable tree

Patch "iwlwifi: mvm: bail out if CTDP start operation fails" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    iwlwifi: mvm: bail out if CTDP start operation fails

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iwlwifi-mvm-bail-out-if-ctdp-start-operation-fails.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 75cfe338b8a6fadaa28879a969047554701a7589 Mon Sep 17 00:00:00 2001
From: Luca Coelho <luciano.coelho@intel.com>
Date: Wed, 14 Sep 2016 11:54:36 +0300
Subject: iwlwifi: mvm: bail out if CTDP start operation fails

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

commit 75cfe338b8a6fadaa28879a969047554701a7589 upstream.

We were assigning the return value of iwl_mvm_ctdp_command() to a
variable, but never checking it.  If this command fails, we should not
allow the interface up process to proceed, since it is potentially
dangerous to ignore thermal management requirements.

Fixes: commit 5c89e7bc557e ("iwlwifi: mvm: add registration to cooling device")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -1214,9 +1214,12 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
 	}
 
 	/* TODO: read the budget from BIOS / Platform NVM */
-	if (iwl_mvm_is_ctdp_supported(mvm) && mvm->cooling_dev.cur_state > 0)
+	if (iwl_mvm_is_ctdp_supported(mvm) && mvm->cooling_dev.cur_state > 0) {
 		ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
 					   mvm->cooling_dev.cur_state);
+		if (ret)
+			goto error;
+	}
 #else
 	/* Initialize tx backoffs to the minimal possible */
 	iwl_mvm_tt_tx_backoff(mvm, 0);


Patches currently in stable-queue which might be from luciano.coelho@intel.com are

queue-4.8/iwlwifi-mvm-support-bar-in-reorder-buffer.patch
queue-4.8/iwlwifi-mvm-disable-p2p-queue-on-mac-context-release.patch
queue-4.8/iwlwifi-mvm-call-a-different-txq_enable-function.patch
queue-4.8/iwlwifi-mvm-free-reserved-queue-on-sta-removal.patch
queue-4.8/iwlwifi-mvm-fix-pending-frames-tracking-on-tx-resp.patch
queue-4.8/iwlwifi-check-for-valid-ethernet-address-provided-by-oem.patch
queue-4.8/iwlwifi-mvm-bail-out-if-ctdp-start-operation-fails.patch