diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/cppi41.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c index 3fb793188b60..b743adf56465 100644 --- a/drivers/dma/cppi41.c +++ b/drivers/dma/cppi41.c @@ -1,3 +1,4 @@ +#include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> @@ -603,12 +604,16 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c) * descriptor before the TD we fetch it from enqueue, it has to be * there waiting for us. */ - if (!c->td_seen && c->td_retry) + if (!c->td_seen && c->td_retry) { + udelay(1); return -EAGAIN; - + } WARN_ON(!c->td_retry); + if (!c->td_desc_seen) { desc_phys = cppi41_pop_desc(cdd, c->q_num); + if (!desc_phys) + desc_phys = cppi41_pop_desc(cdd, c->q_comp_num); WARN_ON(!desc_phys); } |
