| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.4 024/162] scsi: megaraid: Fix a sleep-in-atomic bug | Date | Mon, 9 Apr 2018 00:28:00 +0000 |
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From: Jia-Ju Bai <baijiaju1990@163.com>
[ Upstream commit 896f6966fc815abe71f85fb26f0193875df8a035 ]
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> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- drivers/scsi/megaraid/megaraid_mm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c index a70692779a16..bfc7984a1c17 100644 --- a/drivers/scsi/megaraid/megaraid_mm.c +++ b/drivers/scsi/megaraid/megaraid_mm.c @@ -570,7 +570,7 @@ 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); -- 2.15.1
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