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skd: Use for_each_sg()

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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>
This commit is contained in:
Bart Van Assche 2017-08-17 13:13:15 -07:00 committed by Jens Axboe
parent 79ce12a82e
commit 06f824c409
1 changed files with 6 additions and 6 deletions
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12
drivers/block/skd_main.c
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@ -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;