Patch "qlcnic: Remove unnecessary usage of atomic_t" has been added to the 4.5-stable tree

Patch "qlcnic: Remove unnecessary usage of atomic_t" has been added to the 4.5-stable tree

[gregkh]

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

    qlcnic: Remove unnecessary usage of atomic_t

to the 4.5-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:
     qlcnic-remove-unnecessary-usage-of-atomic_t.patch
and it can be found in the queue-4.5 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 foo@baz Sat Apr 16 09:15:18 PDT 2016
From: Rajesh Borundia <rajesh.borundia@qlogic.com>
Date: Tue, 8 Mar 2016 02:39:57 -0500
Subject: qlcnic: Remove unnecessary usage of atomic_t

From: Rajesh Borundia <rajesh.borundia@qlogic.com>

[ Upstream commit 5bf93251cee1fb66141d1d2eaff86e04a9397bdf ]

o atomic_t usage is incorrect as we are not implementing
any atomicity.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic.h         |    2 +-
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c |    9 ++++-----
 2 files changed, 5 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
@@ -1099,7 +1099,7 @@ struct qlcnic_mailbox {
 	unsigned long		status;
 	spinlock_t		queue_lock;	/* Mailbox queue lock */
 	spinlock_t		aen_lock;	/* Mailbox response/AEN lock */
-	atomic_t		rsp_status;
+	u32			rsp_status;
 	u32			num_cmds;
 };
 
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
@@ -491,7 +491,7 @@ irqreturn_t qlcnic_83xx_clear_legacy_int
 
 static inline void qlcnic_83xx_notify_mbx_response(struct qlcnic_mailbox *mbx)
 {
-	atomic_set(&mbx->rsp_status, QLC_83XX_MBX_RESPONSE_ARRIVED);
+	mbx->rsp_status = QLC_83XX_MBX_RESPONSE_ARRIVED;
 	complete(&mbx->completion);
 }
 
@@ -510,7 +510,7 @@ static void qlcnic_83xx_poll_process_aen
 	if (event &  QLCNIC_MBX_ASYNC_EVENT) {
 		__qlcnic_83xx_process_aen(adapter);
 	} else {
-		if (atomic_read(&mbx->rsp_status) != rsp_status)
+		if (mbx->rsp_status != rsp_status)
 			qlcnic_83xx_notify_mbx_response(mbx);
 	}
 out:
@@ -1023,7 +1023,7 @@ static void qlcnic_83xx_process_aen(stru
 		if (event &  QLCNIC_MBX_ASYNC_EVENT) {
 			__qlcnic_83xx_process_aen(adapter);
 		} else {
-			if (atomic_read(&mbx->rsp_status) != rsp_status)
+			if (mbx->rsp_status != rsp_status)
 				qlcnic_83xx_notify_mbx_response(mbx);
 		}
 	}
@@ -4050,7 +4050,6 @@ static void qlcnic_83xx_mailbox_worker(s
 	struct qlcnic_adapter *adapter = mbx->adapter;
 	const struct qlcnic_mbx_ops *mbx_ops = mbx->ops;
 	struct device *dev = &adapter->pdev->dev;
-	atomic_t *rsp_status = &mbx->rsp_status;
 	struct list_head *head = &mbx->cmd_q;
 	struct qlcnic_hardware_context *ahw;
 	struct qlcnic_cmd_args *cmd = NULL;
@@ -4063,7 +4062,7 @@ static void qlcnic_83xx_mailbox_worker(s
 			return;
 		}
 
-		atomic_set(rsp_status, QLC_83XX_MBX_RESPONSE_WAIT);
+		mbx->rsp_status = QLC_83XX_MBX_RESPONSE_WAIT;
 
 		spin_lock(&mbx->queue_lock);
 


Patches currently in stable-queue which might be from rajesh.borundia@qlogic.com are

queue-4.5/qlcnic-remove-unnecessary-usage-of-atomic_t.patch
queue-4.5/qlcnic-fix-mailbox-completion-handling-during-spurious-interrupt.patch