diff options
| -rw-r--r-- | drivers/dma/fsldma.c | 5 | ||||
| -rw-r--r-- | include/linux/dmaengine.h | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 6541ebf8bf6..bbb4be5a3ff 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -819,8 +819,11 @@ static void fsl_dma_update_completed_cookie(struct fsldma_chan *chan) desc = to_fsl_desc(chan->ld_running.prev); if (dma_is_idle(chan)) cookie = desc->async_tx.cookie; - else + else { cookie = desc->async_tx.cookie - 1; + if (unlikely(cookie < DMA_MIN_COOKIE)) + cookie = DMA_MAX_COOKIE; + } chan->completed_cookie = cookie; diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 78784982b33..4d8d619f28b 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -31,6 +31,8 @@ * if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code */ typedef s32 dma_cookie_t; +#define DMA_MIN_COOKIE 1 +#define DMA_MAX_COOKIE INT_MAX #define dma_submit_error(cookie) ((cookie) < 0 ? 1 : 0) |