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scsi: ufs: do not destroy clk scaling work queue if it is NULL

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Function ufshcd_hba_exit might be called to destroy clk scaling work queue
if failure happends in function ufshcd_init before clk gating work queue
is created. This change fixs it by skipping destroying clk scaling work
queue if it is NULL.

Change-Id: Ifb1c46f490749e4afe7cea331c29d073175f68ef
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo 2018-03-01 11:10:39 +08:00
parent 07ec991ea1
commit 8a7e59ba7f
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/ufs/ufshcd.c
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@ -3,7 +3,7 @@
*
* This code is based on drivers/scsi/ufs/ufshcd.c
* Copyright (C) 2011-2013 Samsung India Software Operations
* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.
* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
*
* Authors:
* Santosh Yaraganavi <santosh.sy@samsung.com>
@ -8431,7 +8431,8 @@ static void ufshcd_hba_exit(struct ufs_hba *hba)
if (ufshcd_is_clkscaling_supported(hba)) {
if (hba->devfreq)
ufshcd_suspend_clkscaling(hba);
destroy_workqueue(hba->clk_scaling.workq);
if (hba->clk_scaling.workq)
destroy_workqueue(hba->clk_scaling.workq);
}
ufshcd_disable_clocks(hba, false);
ufshcd_setup_hba_vreg(hba, false);