diff mbox

[08/18] scsi_dh_alua: return standard SCSI return codes in submit_rtpg

Message ID 1447081703-110552-9-git-send-email-hare@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Hannes Reinecke Nov. 9, 2015, 3:08 p.m. UTC 
Fixup submit_rtpg() to always return a standard SCSI return code.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/device_handler/scsi_dh_alua.c | 33 +++++++++++++++---------------
 1 file changed, 17 insertions(+), 16 deletions(-)

Comments

Johannes Thumshirn Nov. 24, 2015, 12:16 p.m. UTC | #1 
On Mon, 2015-11-09 at 16:08 +0100, Hannes Reinecke wrote:
> Fixup submit_rtpg() to always return a standard SCSI return code.
> 
> Signed-off-by: Hannes Reinecke <hare@suse.de>
> ---
>  drivers/scsi/device_handler/scsi_dh_alua.c | 33 +++++++++++++++-----
> ----------
>  1 file changed, 17 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c
> b/drivers/scsi/device_handler/scsi_dh_alua.c
> index b817963..50fe87c 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -138,11 +138,13 @@ 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;
> @@ -160,13 +162,9 @@ static unsigned submit_rtpg(struct scsi_device
> *sdev, struct alua_dh_data *h,
>  	memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
>  	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);
> -		err = SCSI_DH_IO;
> -	}
> +	blk_execute_rq(rq->q, NULL, rq, 1);
> +	if (rq->errors)
> +		err = rq->errors;
>  	blk_put_request(rq);
>  done:
>  	return err;
> @@ -493,7 +491,7 @@ 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;
> @@ -505,12 +503,17 @@ 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) {
> +	retval = submit_rtpg(sdev, h, rtpg_ext_hdr_req);
> +	if (retval) {
>  		if (!scsi_normalize_sense(h->sense,
> SCSI_SENSE_BUFFERSIZE,
> -					  &sense_hdr))
> +					  &sense_hdr)) {
> +			sdev_printk(KERN_INFO, sdev,
> +				    "%s: rtpg failed, result %d\n",
> +				    ALUA_DH_NAME, retval);
> +			if (driver_byte(retval) == DRIVER_BUSY)
> +				return SCSI_DH_DEV_TEMP_BUSY;
>  			return SCSI_DH_IO;
> +		}
>  
>  		/*
>  		 * submit_rtpg() has failed on existing arrays
> @@ -539,8 +542,6 @@ static int alua_rtpg(struct scsi_device *sdev,
> struct alua_dh_data *h, int wait_
>  		scsi_print_sense_hdr(sdev, ALUA_DH_NAME,
> &sense_hdr);
>  		return SCSI_DH_IO;
>  	}
> -	if (err != SCSI_DH_OK)
> -		return err;
>  
>  	len = (h->buff[0] << 24) + (h->buff[1] << 16) +
>  		(h->buff[2] << 8) + h->buff[3] + 4;

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index b817963..50fe87c 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -138,11 +138,13 @@  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;
@@ -160,13 +162,9 @@  static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h,
 	memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
 	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);
-		err = SCSI_DH_IO;
-	}
+	blk_execute_rq(rq->q, NULL, rq, 1);
+	if (rq->errors)
+		err = rq->errors;
 	blk_put_request(rq);
 done:
 	return err;
@@ -493,7 +491,7 @@  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;
@@ -505,12 +503,17 @@  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) {
+	retval = submit_rtpg(sdev, h, rtpg_ext_hdr_req);
+	if (retval) {
 		if (!scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE,
-					  &sense_hdr))
+					  &sense_hdr)) {
+			sdev_printk(KERN_INFO, sdev,
+				    "%s: rtpg failed, result %d\n",
+				    ALUA_DH_NAME, retval);
+			if (driver_byte(retval) == DRIVER_BUSY)
+				return SCSI_DH_DEV_TEMP_BUSY;
 			return SCSI_DH_IO;
+		}
 
 		/*
 		 * submit_rtpg() has failed on existing arrays
@@ -539,8 +542,6 @@  static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_
 		scsi_print_sense_hdr(sdev, ALUA_DH_NAME, &sense_hdr);
 		return SCSI_DH_IO;
 	}
-	if (err != SCSI_DH_OK)
-		return err;
 
 	len = (h->buff[0] << 24) + (h->buff[1] << 16) +
 		(h->buff[2] << 8) + h->buff[3] + 4;