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scsi: megaraid: Fix a sleep-in-atomic bug 

The driver may sleep under a spin lock, and the function call path is:
mraid_mm_attach_buf (acquire the lock by spin_lock_irqsave)
  pci_pool_alloc(GFP_KERNEL) --> may sleep

To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".

[mkp: fixed whitespace]

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jia-Ju Bai 2017-05-31 10:56:56 +08:00 committed by Martin K. Petersen
parent 566ec9ad31
commit 896f6966fc
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/megaraid/megaraid_mm.c
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@ -574,7 +574,7 @@ mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
kioc->pool_index = right_pool;
kioc->free_buf = 1;
kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_ATOMIC,
&kioc->buf_paddr);
spin_unlock_irqrestore(&pool->lock, flags);