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dmaengine: ioatdma: fix sparse "error" with prep lock

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The prep lock gets acquired in ioat_check_space_lock and released in
ioat_tx_submit_unlock. Setting the annotations so sparse does not freak out.

drivers/dma/ioat/dma.c:273:30: sparse: context imbalance in 'ioat_tx_submit_unlock' - unexpected unlock
drivers/dma/ioat/dma.c:476:5: sparse: context imbalance in 'ioat_check_space_lock' - wrong count at exit

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2015-08-25 12:58:05 -07:00 committed by Vinod Koul
parent 4d112426c3
commit 5c65cb93a3
1 changed files with 2 additions and 0 deletions
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2
drivers/dma/ioat/dma.c
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@ -262,6 +262,7 @@ static int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo)
}
static dma_cookie_t ioat_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
__releases(&ioat_chan->prep_lock)
{
struct dma_chan *c = tx->chan;
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
@ -474,6 +475,7 @@ static bool reshape_ring(struct ioatdma_chan *ioat_chan, int order)
* @num_descs: allocation length
*/
int ioat_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs)
__acquires(&ioat_chan->prep_lock)
{
bool retry;