[PATCH 4.19 09/28] scsi: ufs: Release clock if DMA map fails

From: Greg Kroah-Hartman
Date: Fri Jun 05 2020 - 10:20:59 EST


From: Can Guo <cang@xxxxxxxxxxxxxx>

commit 17c7d35f141ef6158076adf3338f115f64fcf760 upstream.

In queuecommand path, if DMA map fails, it bails out with clock held. In
this case, release the clock to keep its usage paired.

[mkp: applied by hand]

Link: https://lore.kernel.org/r/0101016ed3d66395-1b7e7fce-b74d-42ca-a88a-4db78b795d3b-000000@xxxxxxxxxxxxxxxxxxxxxxx
Reviewed-by: Bean Huo <beanhuo@xxxxxxxxxx>
Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
[EB: resolved cherry-pick conflict caused by newer kernels not having
the clear_bit_unlock() line]
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2505,6 +2505,7 @@ static int ufshcd_queuecommand(struct Sc

err = ufshcd_map_sg(hba, lrbp);
if (err) {
+ ufshcd_release(hba);
lrbp->cmd = NULL;
clear_bit_unlock(tag, &hba->lrb_in_use);
goto out;