[PATCH V5 08/16] staging: unisys: visorhba: use sg helper to operate scatterlist
Ming Lei
ming.lei at redhat.com
Tue Jun 18 01:37:49 UTC 2019
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.
Cc: devel at driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Acked-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Reviewed-by: Christoph Hellwig <hch at lst.de>
Reviewed-by: Bart Van Assche <bvanassche at acm.org>
Signed-off-by: Ming Lei <ming.lei at redhat.com>
---
drivers/staging/unisys/visorhba/visorhba_main.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c
index 2dad36a05518..dd979ee4dcf1 100644
--- a/drivers/staging/unisys/visorhba/visorhba_main.c
+++ b/drivers/staging/unisys/visorhba/visorhba_main.c
@@ -871,12 +871,11 @@ static void do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp,
return;
}
- sg = scsi_sglist(scsicmd);
- for (i = 0; i < scsi_sg_count(scsicmd); i++) {
- this_page_orig = kmap_atomic(sg_page(sg + i));
+ scsi_for_each_sg(scsicmd, sg, scsi_sg_count(scsicmd), i) {
+ this_page_orig = kmap_atomic(sg_page(sg));
this_page = (void *)((unsigned long)this_page_orig |
- sg[i].offset);
- memcpy(this_page, buf + bufind, sg[i].length);
+ sg->offset);
+ memcpy(this_page, buf + bufind, sg->length);
kunmap_atomic(this_page_orig);
}
kfree(buf);
--
2.20.1
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