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>
---
drivers/misc/ibmvmc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/ibmvmc.c b/drivers/misc/ibmvmc.c
index fb83d13..8f82bb9 100644
--- a/drivers/misc/ibmvmc.c
+++ b/drivers/misc/ibmvmc.c
@@ -273,7 +273,7 @@ static void *alloc_dma_buffer(struct vio_dev *vdev, size_t size,
dma_addr_t *dma_handle)
{
/* allocate memory */
- void *buffer = kzalloc(size, GFP_KERNEL);
+ void *buffer = kzalloc(size, GFP_ATOMIC);
if (!buffer) {
*dma_handle = 0;
--
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