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path: root/drivers/dma/ioat/prep.c
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Diffstat (limited to 'drivers/dma/ioat/prep.c')
-rw-r--r--drivers/dma/ioat/prep.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/dma/ioat/prep.c b/drivers/dma/ioat/prep.c
index ad4fb41cd23b..6bb4a13a8fbd 100644
--- a/drivers/dma/ioat/prep.c
+++ b/drivers/dma/ioat/prep.c
@@ -121,6 +121,9 @@ ioat_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest,
size_t total_len = len;
int num_descs, idx, i;
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
num_descs = ioat_xferlen_to_descs(ioat_chan, len);
if (likely(num_descs) &&
ioat_check_space_lock(ioat_chan, num_descs) == 0)
@@ -254,6 +257,11 @@ struct dma_async_tx_descriptor *
ioat_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
unsigned int src_cnt, size_t len, unsigned long flags)
{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
return __ioat_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags);
}
@@ -262,6 +270,11 @@ ioat_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
unsigned int src_cnt, size_t len,
enum sum_check_flags *result, unsigned long flags)
{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
/* the cleanup routine only sets bits on validate failure, it
* does not clear bits on validate success... so clear it here
*/
@@ -574,6 +587,11 @@ ioat_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
unsigned long flags)
{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
/* specify valid address for disabled result */
if (flags & DMA_PREP_PQ_DISABLE_P)
dst[0] = dst[1];
@@ -614,6 +632,11 @@ ioat_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
unsigned int src_cnt, const unsigned char *scf, size_t len,
enum sum_check_flags *pqres, unsigned long flags)
{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
/* specify valid address for disabled result */
if (flags & DMA_PREP_PQ_DISABLE_P)
pq[0] = pq[1];
@@ -638,6 +661,10 @@ ioat_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
{
unsigned char scf[MAX_SCF];
dma_addr_t pq[2];
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
if (src_cnt > MAX_SCF)
return NULL;
@@ -661,6 +688,10 @@ ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
{
unsigned char scf[MAX_SCF];
dma_addr_t pq[2];
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
if (src_cnt > MAX_SCF)
return NULL;
@@ -689,6 +720,9 @@ ioat_prep_interrupt_lock(struct dma_chan *c, unsigned long flags)
struct ioat_ring_ent *desc;
struct ioat_dma_descriptor *hw;
+ if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ return NULL;
+
if (ioat_check_space_lock(ioat_chan, 1) == 0)
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head);
else