diff mbox series

[V4,01/16] scsi: vmw_pscsi: use sg helper to operate scatterlist

Message ID 20190617030349.26415-2-ming.lei@redhat.com (mailing list archive)
State Superseded
Headers show
Series use sg helper to operate scatterlist | expand

Commit Message

Ming Lei June 17, 2019, 3:03 a.m. UTC 
Use the scatterlist iterators and remove direct indexing of the scatterlist
array.

This way allows us to pre-allocate one small scatterlist, which can be chained
with one runtime allocated scatterlist if the pre-allocated one isn't enough
for the whole request.

Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 drivers/scsi/vmw_pvscsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Christoph Hellwig June 17, 2019, 8:22 a.m. UTC | #1 
On Mon, Jun 17, 2019 at 11:03:34AM +0800, Ming Lei wrote:
> Use the scatterlist iterators and remove direct indexing of the scatterlist
> array.
> 
> This way allows us to pre-allocate one small scatterlist, which can be chained
> with one runtime allocated scatterlist if the pre-allocated one isn't enough
> for the whole request.
> 
> Reviewed-by: Ewan D. Milne <emilne@redhat.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/drivers/scsi/vmw_pvscsi.c b/drivers/scsi/vmw_pvscsi.c
index ecee4b3ff073..d71abd416eb4 100644
--- a/drivers/scsi/vmw_pvscsi.c
+++ b/drivers/scsi/vmw_pvscsi.c
@@ -335,7 +335,7 @@  static void pvscsi_create_sg(struct pvscsi_ctx *ctx,
 	BUG_ON(count > PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT);
 
 	sge = &ctx->sgl->sge[0];
-	for (i = 0; i < count; i++, sg++) {
+	for (i = 0; i < count; i++, sg = sg_next(sg)) {
 		sge[i].addr   = sg_dma_address(sg);
 		sge[i].length = sg_dma_len(sg);
 		sge[i].flags  = 0;