From: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
CC [M] drivers/dma/ioat/prep.o
drivers/dma/ioat/prep.c: In function 'ioat_prep_pqxor':
drivers/dma/ioat/prep.c:682:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
^
drivers/dma/ioat/prep.c: In function 'ioat_prep_pqxor_val':
drivers/dma/ioat/prep.c:714:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
gcc version 5.3.1 20151219 (Ubuntu 5.3.1-4ubuntu1)
Cc: Vinod Koul <vinod.koul@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
Cc: Nicholas Mc Guire <der.herr@xxxxxxx>
Cc: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
Signed-off-by: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
---
drivers/dma/ioat/prep.c | 30 ++++++++++++++++++++++--------
1 file changed, 22 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/ioat/prep.c b/drivers/dma/ioat/prep.c
index 6bb4a13..ff62763 100644
--- a/drivers/dma/ioat/prep.c
+++ b/drivers/dma/ioat/prep.c
@@ -655,30 +655,41 @@ ioat_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
flags);
}
+static char *ioat_alloc_scf(unsigned int src_cnt)
+{
+ if (!src_cnt || src_cnt > MAX_SCF)
+ return NULL;
+
+ return kzalloc(src_cnt, GFP_KERNEL);
+}
+
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[MAX_SCF];
+ unsigned char *scf;
dma_addr_t pq[2];
struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+ struct dma_async_tx_descriptor *desc;
if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
return NULL;
- if (src_cnt > MAX_SCF)
+ scf = ioat_alloc_scf(src_cnt);
+ if (!scf)
return NULL;
- memset(scf, 0, src_cnt);
pq[0] = dst;
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[1] = dst; /* specify valid address for disabled result */
- return src_cnt_flags(src_cnt, flags) > 8 ?
+ desc = src_cnt_flags(src_cnt, flags) > 8 ?
__ioat_prep_pq16_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags) :
__ioat_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
flags);
+ kfree(scf);
+ return desc;
}
struct dma_async_tx_descriptor *
@@ -686,14 +697,16 @@ 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[MAX_SCF];
+ unsigned char *scf;
dma_addr_t pq[2];
struct ioatdma_chan *ioat_chan = to_ioat_chan(chan);
+ struct dma_async_tx_descriptor *desc;
if (test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
return NULL;
- if (src_cnt > MAX_SCF)
+ scf = ioat_alloc_scf(src_cnt);
+ if (!scf)
return NULL;
/* the cleanup routine only sets bits on validate failure, it
@@ -701,16 +714,17 @@ ioat_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
*/
*result = 0;
- memset(scf, 0, src_cnt);
pq[0] = src[0];
flags |= DMA_PREP_PQ_DISABLE_Q;
pq[1] = pq[0]; /* specify valid address for disabled result */
- return src_cnt_flags(src_cnt, flags) > 8 ?
+ desc = src_cnt_flags(src_cnt, flags) > 8 ?
__ioat_prep_pq16_lock(chan, result, pq, &src[1], src_cnt - 1,
scf, len, flags) :
__ioat_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1,
scf, len, flags);
+ kfree(scf);
+ return desc;
}
struct dma_async_tx_descriptor *
--
1.9.1
--
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