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misc: ibmvmc: Use GFP_ATOMIC under spin lock

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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: 0eca353e7a ("misc: IBM Virtual Management Channel Driver (VMC)")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yongjun 2018-05-26 09:45:59 +00:00 committed by Greg Kroah-Hartman
parent 5faecb0162
commit 97b715b62e
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/ibmvmc.c
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@ -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;