diff options
| author | Rob Clark <rob@ti.com> | 2012-09-28 09:29:43 +0200 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2012-12-20 12:05:05 +0530 |
| commit | b6fa0cd62c5b9d47f8e5d42cb2876677a5ed701e (patch) | |
| tree | bb8b4c8abd5b37a9aff71b6757187339202d977a /drivers | |
| parent | f01af9f85855e38fbd601e033a8eac204cc4cc1c (diff) | |
| download | linux-b6fa0cd62c5b9d47f8e5d42cb2876677a5ed701e.tar.bz2 | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/dma-buf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index 460e22dee36d..a3f79c495a41 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; |