On Mon, 2015-11-09 at 16:08 +0100, Hannes Reinecke wrote:
> The only check for a valid sense code is calling
> scsi_normalize_sense()
> and check the return value. So drop the pointless checks and rely on
> scsi_normalize_sense() to figure out if the sense code is valid.
> With that we can also remove the 'senselen' field.
>
> Reviewed-by: Bart van Assche <bvanass...@sandisk.com>
> Signed-off-by: Hannes Reinecke <h...@suse.de>
> ---
> drivers/scsi/device_handler/scsi_dh_alua.c | 18 +++++++-----------
> 1 file changed, 7 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c
> b/drivers/scsi/device_handler/scsi_dh_alua.c
> index c63f304..240a5dc 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -73,7 +73,6 @@ struct alua_dh_data {
> int bufflen;
> unsigned char transition_tmo;
> unsigned char sense[SCSI_SENSE_BUFFERSIZE];
> - int senselen;
> struct scsi_device *sdev;
> activate_complete callback_fn;
> void *callback_data;
> @@ -158,14 +157,13 @@ static unsigned submit_rtpg(struct scsi_device
> *sdev, struct alua_dh_data *h,
>
> rq->sense = h->sense;
> memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
> - rq->sense_len = h->senselen = 0;
> + rq->sense_len = 0;
>
> err = blk_execute_rq(rq->q, NULL, rq, 1);
> if (err == -EIO) {
> sdev_printk(KERN_INFO, sdev,
> "%s: rtpg failed with %x\n",
> ALUA_DH_NAME, rq->errors);
> - h->senselen = rq->sense_len;
> err = SCSI_DH_IO;
> }
> blk_put_request(rq);
> @@ -194,9 +192,8 @@ static void stpg_endio(struct request *req, int
> error)
> goto done;
> }
>
> - if (req->sense_len > 0) {
> - err = scsi_normalize_sense(h->sense,
> SCSI_SENSE_BUFFERSIZE,
> - &sense_hdr);
> + if (scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE,
> + &sense_hdr)) {
> if (!err) {
> err = SCSI_DH_IO;
> goto done;
> @@ -265,7 +262,7 @@ static unsigned submit_stpg(struct alua_dh_data
> *h)
>
> rq->sense = h->sense;
> memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
> - rq->sense_len = h->senselen = 0;
> + rq->sense_len = 0;
> rq->end_io_data = h;
>
> blk_execute_rq_nowait(rq->q, NULL, rq, 1, stpg_endio);
> @@ -514,10 +511,9 @@ static int alua_rtpg(struct scsi_device *sdev,
> struct alua_dh_data *h, int wait_
> retry:
> err = submit_rtpg(sdev, h, rtpg_ext_hdr_req);
>
> - if (err == SCSI_DH_IO && h->senselen > 0) {
> - err = scsi_normalize_sense(h->sense,
> SCSI_SENSE_BUFFERSIZE,
> - &sense_hdr);
> - if (!err)
> + if (err == SCSI_DH_IO) {
> + if (!scsi_normalize_sense(h->sense,
> SCSI_SENSE_BUFFERSIZE,
> + &sense_hdr))
> return SCSI_DH_IO;
>
> /*
Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
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