From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [PATCH V4 13/16] scsi: pcmcia: nsp_cs: use sg helper to operate scatterlist Date: Mon, 17 Jun 2019 11:03:46 +0800 Message-ID: <20190617030349.26415-14-ming.lei@redhat.com> References: <20190617030349.26415-1-ming.lei@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190617030349.26415-1-ming.lei@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: linux-scsi@vger.kernel.org, "Martin K . Petersen" Cc: Michael Schmitz , devel@driverdev.osuosl.org, Hannes Reinecke , Benjamin Block , Bart Van Assche , Greg Kroah-Hartman , linux-usb@vger.kernel.org, James Smart , "Ewan D . Milne" , Jim Gill , James Bottomley , Brian King , Finn Thain , "Juergen E . Fischer" , Ming Lei , Christoph Hellwig , Dan Carpenter List-Id: linux-scsi@vger.kernel.org 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. Signed-off-by: Ming Lei --- drivers/scsi/pcmcia/nsp_cs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c index a81748e6e8fb..97416e1dcc5b 100644 --- a/drivers/scsi/pcmcia/nsp_cs.c +++ b/drivers/scsi/pcmcia/nsp_cs.c @@ -789,7 +789,7 @@ static void nsp_pio_read(struct scsi_cmnd *SCpnt) SCpnt->SCp.buffers_residual != 0 ) { //nsp_dbg(NSP_DEBUG_DATA_IO, "scatterlist next timeout=%d", time_out); SCpnt->SCp.buffers_residual--; - SCpnt->SCp.buffer++; + SCpnt->SCp.buffer = sg_next(SCpnt->SCp.buffer); SCpnt->SCp.ptr = BUFFER_ADDR; SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length; time_out = 1000; @@ -887,7 +887,7 @@ static void nsp_pio_write(struct scsi_cmnd *SCpnt) SCpnt->SCp.buffers_residual != 0 ) { //nsp_dbg(NSP_DEBUG_DATA_IO, "scatterlist next"); SCpnt->SCp.buffers_residual--; - SCpnt->SCp.buffer++; + SCpnt->SCp.buffer = sg_next(SCpnt->SCp.buffer); SCpnt->SCp.ptr = BUFFER_ADDR; SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length; time_out = 1000; -- 2.20.1