Commit b6fa0cd6 authored Sep 28, 2012 by Rob Clark Committed by Sumit Semwal Dec 20, 2012

dma-buf: might_sleep() in dma_buf_unmap_attachment()



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@ti.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

parent f01af9f8

drivers/base/dma-buf.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;