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UPSTREAM: scsi: ufs: Fix register dump caused sleep in atomic context

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ufshcd_print_host_regs() can be called by interrupt handler, but it may
sleep due to ufshcd_dump_regs() allocates the dump buffer memory with flag
GFP_KERNEL. Fix it by changing GFP_KERNEL to GFP_ATMOIC.

Link: https://lore.kernel.org/r/1573798172-20534-5-git-send-email-cang@codeaurora.org
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Bug: 143632303
Change-Id: I0caae42ac6df8080876046eea674d08933f769ee
(cherry picked from commit cddaebaf3d81584180d647e9cbda4ecbf8e8e71c)
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo 2019-11-14 22:09:27 -08:00 • committed by Todd Kjos
commit aa581c5f7c
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/ufs/ufshcd.c
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@ -121,7 +121,7 @@ int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
if (offset % 4 != 0 || len % 4 != 0) /* keep readl happy */
return -EINVAL;
regs = kzalloc(len, GFP_KERNEL);
regs = kzalloc(len, GFP_ATOMIC);
if (!regs)
return -ENOMEM;