diff options
Diffstat (limited to 'drivers/dma/iovlock.c')
| -rw-r--r-- | drivers/dma/iovlock.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c index 9f6fe46a9b8..bb48a57c2fc 100644 --- a/drivers/dma/iovlock.c +++ b/drivers/dma/iovlock.c @@ -27,6 +27,7 @@ #include <linux/dmaengine.h> #include <linux/pagemap.h> +#include <linux/slab.h> #include <net/tcp.h> /* for memcpy_toiovec */ #include <asm/io.h> #include <asm/uaccess.h> @@ -183,6 +184,11 @@ 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 +254,11 @@ 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; |