Messages in this thread Patch in this message | | | From | Can Guo <> | Subject | [PATCH V2 1/1] scsi: ufs: Fix a possible NULL pointer issue | Date | Sun, 13 Dec 2020 19:41:32 -0800 |
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During system resume/suspend, hba could be NULL. In this case, do not touch eh_sem.
Fixes: 88a92d6ae4fe ("scsi: ufs: Serialize eh_work with system PM events and async scan")
Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/scsi/ufs/ufshcd.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index c1c401b..ef155a9 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -8883,8 +8883,11 @@ int ufshcd_system_suspend(struct ufs_hba *hba) int ret = 0; ktime_t start = ktime_get(); + if (!hba) + return 0; + down(&hba->eh_sem); - if (!hba || !hba->is_powered) + if (!hba->is_powered) return 0; if ((ufs_get_pm_lvl_to_dev_pwr_mode(hba->spm_lvl) == @@ -8932,10 +8935,8 @@ int ufshcd_system_resume(struct ufs_hba *hba) int ret = 0; ktime_t start = ktime_get(); - if (!hba) { - up(&hba->eh_sem); + if (!hba) return -EINVAL; - } if (!hba->is_powered || pm_runtime_suspended(hba->dev)) /* -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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