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ufs: ufshcd: Prevent sleeping in IRQ context

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Few paths from the ufshcd driver is allowing the IRQ
handler path to go to sleep, which is incorrect. Hence,
prevent them from going to sleep by switching to GFP_ATOMIC
(instead of GFP_KERNEL), and disabling the path to dump
the registers.

Change-Id: Id8ed3e659e9e22b41fa0956543423824c66bf511
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
This commit is contained in:
Raghavendra Rao Ananta 2019-08-04 10:50:25 -07:00 • committed by Elliot Berman
commit 925d34dfea
1 changed files with 1 additions and 3 deletions
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4
drivers/scsi/ufs/ufshcd.c
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@ -114,7 +114,7 @@ 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;
@ -431,8 +431,6 @@ static void ufshcd_print_host_regs(struct ufs_hba *hba)
ufshcd_print_clk_freqs(hba);
if (hba->vops && hba->vops->dbg_register_dump)
hba->vops->dbg_register_dump(hba);
}
static