4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
[ Upstream commit 97b715b62e5b4c6edb75d023f556fd09a46cb4e1 ]
The function alloc_dma_buffer() is called from ibmvmc_add_buffer(),
in which a spin lock be held here, so we should use GFP_ATOMIC when
a lock is held.
Fixes: 0eca353e7ae7 ("misc: IBM Virtual Management Channel Driver (VMC)")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
Reviewed-by: Bryant G. Ly <bryantly@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/misc/ibmvmc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/misc/ibmvmc.c
+++ b/drivers/misc/ibmvmc.c
@@ -273,7 +273,7 @@ static void *alloc_dma_buffer(struct vio
dma_addr_t *dma_handle)
{
/* allocate memory */
- void *buffer = kzalloc(size, GFP_KERNEL);
+ void *buffer = kzalloc(size, GFP_ATOMIC);
if (!buffer) {
*dma_handle = 0;
