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-rw-r--r--drivers/dma/iovlock.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c
index 9f6fe46..c0a272c7 100644
--- a/drivers/dma/iovlock.c
+++ b/drivers/dma/iovlock.c
@@ -183,6 +183,11 @@ dma_cookie_t dma_memcpy_to_iovec(struct dma_chan *chan, struct iovec *iov,
iov_byte_offset,
kdata,
copy);
+ /* poll for a descriptor slot */
+ if (unlikely(dma_cookie < 0)) {
+ dma_async_issue_pending(chan);
+ continue;
+ }
len -= copy;
iov[iovec_idx].iov_len -= copy;
@@ -248,6 +253,11 @@ dma_cookie_t dma_memcpy_pg_to_iovec(struct dma_chan *chan, struct iovec *iov,
page,
offset,
copy);
+ /* poll for a descriptor slot */
+ if (unlikely(dma_cookie < 0)) {
+ dma_async_issue_pending(chan);
+ continue;
+ }
len -= copy;
iov[iovec_idx].iov_len -= copy;
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