4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Wei Yongjun <[email protected]> [ 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 <[email protected]> Reviewed-by: Bryant G. Ly <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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;
