diff options
Diffstat (limited to 'drivers/dma/ioat/prep.c')
| -rw-r--r-- | drivers/dma/ioat/prep.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/dma/ioat/prep.c b/drivers/dma/ioat/prep.c index e323a4036908..ad4fb41cd23b 100644 --- a/drivers/dma/ioat/prep.c +++ b/drivers/dma/ioat/prep.c @@ -26,6 +26,8 @@ #include "hw.h" #include "dma.h" +#define MAX_SCF 1024 + /* provide a lookup table for setting the source address in the base or * extended descriptor of an xor or pq descriptor */ @@ -634,9 +636,12 @@ struct dma_async_tx_descriptor * ioat_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src, unsigned int src_cnt, size_t len, unsigned long flags) { - unsigned char scf[src_cnt]; + unsigned char scf[MAX_SCF]; dma_addr_t pq[2]; + if (src_cnt > MAX_SCF) + return NULL; + memset(scf, 0, src_cnt); pq[0] = dst; flags |= DMA_PREP_PQ_DISABLE_Q; @@ -654,9 +659,12 @@ ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt, size_t len, enum sum_check_flags *result, unsigned long flags) { - unsigned char scf[src_cnt]; + unsigned char scf[MAX_SCF]; dma_addr_t pq[2]; + if (src_cnt > MAX_SCF) + return NULL; + /* the cleanup routine only sets bits on validate failure, it * does not clear bits on validate success... so clear it here */ |