From: Rob Clark <rob@xxxxxx> We never really clarified if unmap could be done in atomic context. But since mapping might require sleeping, this implies mutex in use to synchronize mapping/unmapping, so unmap could sleep as well. Add a might_sleep() to clarify this. Signed-off-by: Rob Clark <rob@xxxxxx> Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx> --- drivers/base/dma-buf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index c30f3e1..877eacb 100644 --- a/drivers/base/dma-buf.c +++ b/drivers/base/dma-buf.c @@ -298,6 +298,8 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, struct sg_table *sg_table, enum dma_data_direction direction) { + might_sleep(); + if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) return; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html