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 4cf9ed96414f..544d6f7e6138 100644 --- a/drivers/scsi/megaraid/megaraid_mm.c +++ b/drivers/scsi/megaraid/megaraid_mm.c @@ -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);