From: Ming Lei <ming.lei@redhat.com>
To: linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
Bart Van Assche <bvanassche@acm.org>,
Hannes Reinecke <hare@suse.com>, Christoph Hellwig <hch@lst.de>,
Jim Gill <jgill@vmware.com>, Cathy Avery <cavery@redhat.com>,
"Ewan D . Milne" <emilne@redhat.com>,
Brian King <brking@us.ibm.com>,
James Smart <james.smart@broadcom.com>,
"Juergen E . Fischer" <fischer@norbit.de>,
Michael Schmitz <schmitzmic@gmail.com>,
Finn Thain <fthain@telegraphics.com.au>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devel@driverdev.osuosl.org, linux-usb@vger.kernel.org,
Dan Carpenter <dan.carpenter@oracle.com>,
Benjamin Block <bblock@linux.ibm.com>,
Ming Lei <ming.lei@redhat.com>,
Steffen Maier <maier@linux.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-s390@vger.kernel.org
Subject: [PATCH V4 10/16] s390: zfcp_fc: use sg helper to operate scatterlist
Date: Mon, 17 Jun 2019 11:03:43 +0800 [thread overview]
Message-ID: <20190617030349.26415-11-ming.lei@redhat.com> (raw)
In-Reply-To: <20190617030349.26415-1-ming.lei@redhat.com>
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: Steffen Maier <maier@linux.ibm.com>
Cc: Benjamin Block <bblock@linux.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Acked-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
drivers/s390/scsi/zfcp_fc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 33eddb02ee30..b018b61bd168 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -620,7 +620,7 @@ static void zfcp_fc_sg_free_table(struct scatterlist *sg, int count)
{
int i;
- for (i = 0; i < count; i++, sg++)
+ for (i = 0; i < count; i++, sg = sg_next(sg))
if (sg)
free_page((unsigned long) sg_virt(sg));
else
@@ -641,7 +641,7 @@ static int zfcp_fc_sg_setup_table(struct scatterlist *sg, int count)
int i;
sg_init_table(sg, count);
- for (i = 0; i < count; i++, sg++) {
+ for (i = 0; i < count; i++, sg = sg_next(sg)) {
addr = (void *) get_zeroed_page(GFP_KERNEL);
if (!addr) {
zfcp_fc_sg_free_table(sg, i);
--
2.20.1
next prev parent reply other threads:[~2019-06-17 3:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-17 3:03 [PATCH V4 00/16] use sg helper to operate scatterlist Ming Lei
2019-06-17 3:03 ` [PATCH V4 01/16] scsi: vmw_pscsi: " Ming Lei
2019-06-17 8:22 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 02/16] scsi: advansys: " Ming Lei
2019-06-17 8:22 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 03/16] scsi: lpfc: " Ming Lei
2019-06-17 8:22 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 04/16] scsi: mvumi: " Ming Lei
2019-06-17 8:22 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 05/16] scsi: ipr: " Ming Lei
2019-06-17 8:24 ` Christoph Hellwig
2019-06-17 8:50 ` Ming Lei
2019-06-17 3:03 ` [PATCH V4 06/16] scsi: pmcraid: " Ming Lei
2019-06-17 8:24 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 07/16] usb: image: microtek: " Ming Lei
2019-06-17 8:25 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 08/16] staging: unisys: visorhba: " Ming Lei
2019-06-17 8:25 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 09/16] staging: rtsx: " Ming Lei
2019-06-17 8:27 ` Christoph Hellwig
2019-06-17 9:15 ` Ming Lei
2019-06-17 9:24 ` Christoph Hellwig
2019-06-17 3:03 ` Ming Lei [this message]
2019-06-17 8:27 ` [PATCH V4 10/16] s390: zfcp_fc: " Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 11/16] scsi: aha152x: " Ming Lei
2019-06-17 3:35 ` Finn Thain
2019-06-17 23:35 ` Finn Thain
2019-06-18 0:15 ` Ming Lei
2019-06-17 8:28 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 12/16] scsi: imm: " Ming Lei
2019-06-17 8:28 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 13/16] scsi: pcmcia: nsp_cs: " Ming Lei
2019-06-17 8:29 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 14/16] scsi: ppa: " Ming Lei
2019-06-17 8:29 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 15/16] scsi: wd33c93: " Ming Lei
2019-06-17 8:29 ` Christoph Hellwig
2019-06-17 3:03 ` [PATCH V4 16/16] NCR5380: Support chained sg lists Ming Lei
2019-06-17 8:30 ` Christoph Hellwig
2019-06-17 23:52 ` [PATCH V4 00/16] use sg helper to operate scatterlist Bart Van Assche
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