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Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/ioat_dma.c11
-rw-r--r--drivers/dma/iovlock.c17
2 files changed, 15 insertions, 13 deletions
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index b0438c4f0c3..ecd743f7cc6 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -525,7 +525,7 @@ static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
}
hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
- if (new->async_tx.callback) {
+ if (first->async_tx.callback) {
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
if (first != new) {
/* move callback into to last desc */
@@ -617,7 +617,7 @@ static dma_cookie_t ioat2_tx_submit(struct dma_async_tx_descriptor *tx)
}
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
- if (new->async_tx.callback) {
+ if (first->async_tx.callback) {
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
if (first != new) {
/* move callback into to last desc */
@@ -807,6 +807,12 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
struct ioat_desc_sw *desc, *_desc;
int in_use_descs = 0;
+ /* Before freeing channel resources first check
+ * if they have been previously allocated for this channel.
+ */
+ if (ioat_chan->desccount == 0)
+ return;
+
tasklet_disable(&ioat_chan->cleanup_task);
ioat_dma_memcpy_cleanup(ioat_chan);
@@ -869,6 +875,7 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
ioat_chan->last_completion = ioat_chan->completion_addr = 0;
ioat_chan->pending = 0;
ioat_chan->dmacount = 0;
+ ioat_chan->desccount = 0;
ioat_chan->watchdog_completion = 0;
ioat_chan->last_compl_desc_addr_hw = 0;
ioat_chan->watchdog_tcp_cookie =
diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c
index e763d723e4c..9f6fe46a9b8 100644
--- a/drivers/dma/iovlock.c
+++ b/drivers/dma/iovlock.c
@@ -55,7 +55,6 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
int nr_iovecs = 0;
int iovec_len_used = 0;
int iovec_pages_used = 0;
- long err;
/* don't pin down non-user-based iovecs */
if (segment_eq(get_fs(), KERNEL_DS))
@@ -72,23 +71,21 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
local_list = kmalloc(sizeof(*local_list)
+ (nr_iovecs * sizeof (struct dma_page_list))
+ (iovec_pages_used * sizeof (struct page*)), GFP_KERNEL);
- if (!local_list) {
- err = -ENOMEM;
+ if (!local_list)
goto out;
- }
/* list of pages starts right after the page list array */
pages = (struct page **) &local_list->page_list[nr_iovecs];
+ local_list->nr_iovecs = 0;
+
for (i = 0; i < nr_iovecs; i++) {
struct dma_page_list *page_list = &local_list->page_list[i];
len -= iov[i].iov_len;
- if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len)) {
- err = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len))
goto unpin;
- }
page_list->nr_pages = num_pages_spanned(&iov[i]);
page_list->base_address = iov[i].iov_base;
@@ -109,10 +106,8 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
NULL);
up_read(&current->mm->mmap_sem);
- if (ret != page_list->nr_pages) {
- err = -ENOMEM;
+ if (ret != page_list->nr_pages)
goto unpin;
- }
local_list->nr_iovecs = i + 1;
}
@@ -122,7 +117,7 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
unpin:
dma_unpin_iovec_pages(local_list);
out:
- return ERR_PTR(err);
+ return NULL;
}
void dma_unpin_iovec_pages(struct dma_pinned_list *pinned_list)