diff options
Diffstat (limited to 'drivers/dma/ioat/prep.c')
| -rw-r--r-- | drivers/dma/ioat/prep.c | 34 |
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 |