| Message ID | 1348817383-30286-1-git-send-email-rob.clark@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Op 28-09-12 09:29, Rob Clark schreef: > From: Rob Clark <rob@ti.com> > > 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> > --- > 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; > Looks good to me! Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
On Friday 28 September 2012 01:09 PM, Maarten Lankhorst wrote: > Op 28-09-12 09:29, Rob Clark schreef: >> From: Rob Clark <rob@ti.com> >> >> 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> >> --- >> 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; >> > Looks good to me! > > Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Thanks Rob, Applied to for-next. > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
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;