Patch "net: hns3: fix wrong use of semaphore up" has been added to the 6.6-stable tree

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

    net: hns3: fix wrong use of semaphore up

to the 6.6-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:
     net-hns3-fix-wrong-use-of-semaphore-up.patch
and it can be found in the queue-6.6 subdirectory.

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



commit 6172798f0aa47aa1827aa03aab32e389715cfe8f
Author: Jie Wang <wangjie125@xxxxxxxxxx>
Date:   Tue Aug 13 22:10:20 2024 +0800

    net: hns3: fix wrong use of semaphore up
    
    [ Upstream commit 8445d9d3c03101859663d34fda747f6a50947556 ]
    
    Currently, if hns3 PF or VF FLR reset failed after five times retry,
    the reset done process will directly release the semaphore
    which has already released in hclge_reset_prepare_general.
    This will cause down operation fail.
    
    So this patch fixes it by adding reset state judgement. The up operation is
    only called after successful PF FLR reset.
    
    Fixes: 8627bdedc435 ("net: hns3: refactor the precedure of PF FLR")
    Fixes: f28368bb4542 ("net: hns3: refactor the procedure of VF FLR")
    Signed-off-by: Jie Wang <wangjie125@xxxxxxxxxx>
    Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
    Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index c8059d96f64be..ad8e56234b284 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11430,8 +11430,8 @@ static void hclge_reset_done(struct hnae3_ae_dev *ae_dev)
 		dev_err(&hdev->pdev->dev, "fail to rebuild, ret=%d\n", ret);
 
 	hdev->reset_type = HNAE3_NONE_RESET;
-	clear_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
-	up(&hdev->reset_sem);
+	if (test_and_clear_bit(HCLGE_STATE_RST_HANDLING, &hdev->state))
+		up(&hdev->reset_sem);
 }
 
 static void hclge_clear_resetting_state(struct hclge_dev *hdev)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 43ee20eb03d1f..affdd9d70549a 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -1710,8 +1710,8 @@ static void hclgevf_reset_done(struct hnae3_ae_dev *ae_dev)
 			 ret);
 
 	hdev->reset_type = HNAE3_NONE_RESET;
-	clear_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state);
-	up(&hdev->reset_sem);
+	if (test_and_clear_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state))
+		up(&hdev->reset_sem);
 }
 
 static u32 hclgevf_get_fw_version(struct hnae3_handle *handle)




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