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authorBart Van Assche <bart.vanassche@wdc.com>2017-08-17 13:13:15 -0700
committerJens Axboe <axboe@kernel.dk>2017-08-18 08:45:29 -0600
commit06f824c409487ef55ab4c1fdb922734691318344 (patch)
tree2405027065732a5f346cc5c83ff725afc0eff381
parent79ce12a82ec5e8cb2db73ba2dac24418285fcf07 (diff)
skd: Use for_each_sg()
This change makes skd_preop_sg_list() support chained sg-lists. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--drivers/block/skd_main.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index a363d5f6bcb5..62e06e35ddf5 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -740,7 +740,7 @@ static bool skd_preop_sg_list(struct skd_device *skdev,
struct skd_request_context *skreq)
{
struct request *req = skreq->req;
- struct scatterlist *sg = &skreq->sg[0];
+ struct scatterlist *sgl = &skreq->sg[0], *sg;
int n_sg;
int i;
@@ -749,7 +749,7 @@ static bool skd_preop_sg_list(struct skd_device *skdev,
WARN_ON_ONCE(skreq->data_dir != DMA_TO_DEVICE &&
skreq->data_dir != DMA_FROM_DEVICE);
- n_sg = blk_rq_map_sg(skdev->queue, req, sg);
+ n_sg = blk_rq_map_sg(skdev->queue, req, sgl);
if (n_sg <= 0)
return false;
@@ -757,7 +757,7 @@ static bool skd_preop_sg_list(struct skd_device *skdev,
* Map scatterlist to PCI bus addresses.
* Note PCI might change the number of entries.
*/
- n_sg = pci_map_sg(skdev->pdev, sg, n_sg, skreq->data_dir);
+ n_sg = pci_map_sg(skdev->pdev, sgl, n_sg, skreq->data_dir);
if (n_sg <= 0)
return false;
@@ -765,10 +765,10 @@ static bool skd_preop_sg_list(struct skd_device *skdev,
skreq->n_sg = n_sg;
- for (i = 0; i < n_sg; i++) {
+ for_each_sg(sgl, sg, n_sg, i) {
struct fit_sg_descriptor *sgd = &skreq->sksg_list[i];
- u32 cnt = sg_dma_len(&sg[i]);
- uint64_t dma_addr = sg_dma_address(&sg[i]);
+ u32 cnt = sg_dma_len(sg);
+ uint64_t dma_addr = sg_dma_address(sg);
sgd->control = FIT_SGD_CONTROL_NOT_LAST;
sgd->byte_count = cnt;