On Thu, 2015-08-27 at 14:41 +0200, Hannes Reinecke wrote:
> Fixup submit_rtpg() to always return a standard SCSI return code.
>
> Signed-off-by: Hannes Reinecke <h...@suse.de>
> ---
> drivers/scsi/device_handler/scsi_dh_alua.c | 38
> +++++++++++++++++-------------
> 1 file changed, 22 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c
> b/drivers/scsi/device_handler/scsi_dh_alua.c
> index 7b43ee3..c41d662 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -139,11 +139,13 @@ static unsigned submit_rtpg(struct scsi_device *sdev,
> struct alua_dh_data *h,
> bool rtpg_ext_hdr_req)
> {
> struct request *rq;
> - int err = SCSI_DH_RES_TEMP_UNAVAIL;
> + int err = 0;
>
> rq = get_alua_req(sdev, h->buff, h->bufflen, READ);
> - if (!rq)
> + if (!rq) {
> + err = DRIVER_BUSY << 24;
> goto done;
> + }
>
> /* Prepare the command. */
> rq->cmd[0] = MAINTENANCE_IN;
> @@ -161,13 +163,10 @@ static unsigned submit_rtpg(struct scsi_device *sdev,
> struct alua_dh_data *h,
> memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
> rq->sense_len = h->senselen = 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);
> + blk_execute_rq(rq->q, NULL, rq, 1);
> + if (rq->errors) {
> + err = rq->errors;
> h->senselen = rq->sense_len;
> - err = SCSI_DH_IO;
> }
> blk_put_request(rq);
> done:
> @@ -489,7 +488,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct
> alua_dh_data *h, int wait_
> struct scsi_sense_hdr sense_hdr;
> int len, k, off, valid_states = 0;
> unsigned char *ucp;
> - unsigned err;
> + unsigned err, retval;
> bool rtpg_ext_hdr_req = 1;
> unsigned long expiry, interval = 0;
> unsigned int tpg_desc_tbl_off;
> @@ -501,13 +500,20 @@ static int alua_rtpg(struct scsi_device *sdev, struct
> alua_dh_data *h, int wait_
> expiry = round_jiffies_up(jiffies + h->transition_tmo * HZ);
>
> 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)
> - return SCSI_DH_IO;
> + retval = submit_rtpg(sdev, h, rtpg_ext_hdr_req);
> +
> + if (retval) {
> + if (!scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE,
> + &sense_hdr)) {
> + sdev_printk(KERN_INFO, sdev,
> + "%s: rtpg failed, result %d\n",
> + ALUA_DH_NAME, retval);
> + if (driver_byte(retval) == DRIVER_BUSY)
> + err = SCSI_DH_DEV_TEMP_BUSY;
> + else
> + err = SCSI_DH_IO;
> + return err;
> + }
>
> /*
> * submit_rtpg() has failed on existing arrays
Reviewed-by: Ewan D. Milne <emi...@redhat.com>
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