Commit febd7a5c authored by Alan D. Brunelle's avatar Alan D. Brunelle Committed by Jens Axboe
Browse files

Commands needing to be retried require a complete re-initialization. 

The test-unit-ready portion of this patch was causing boots to fail on
my test machine (as in http://lkml.org/lkml/2008/12/5/161

). With this
patch in place, the system is booting reliably.

Mike Anderson found the same problem in the hp_hw_start_stop code,
and I applied the same solution in cdrom_read_cdda_bpc.

Signed-off-by: default avatarAlan D. Brunelle <alan.brunelle@hp.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 6c34bc29

drivers/cdrom/cdrom.c

+10 −6
Original line number Diff line number Diff line
@@ -2081,10 +2081,6 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 
	if (!q)

		return -ENXIO;



	rq = blk_get_request(q, READ, GFP_KERNEL);

	if (!rq)

		return -ENOMEM;



	cdi->last_sense = 0;



	while (nframes) {
@@ -2096,9 +2092,17 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 


		len = nr * CD_FRAMESIZE_RAW;



		rq = blk_get_request(q, READ, GFP_KERNEL);

		if (!rq) {

			ret = -ENOMEM;

			break;

		}



		ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);

		if (ret)

		if (ret) {

			blk_put_request(rq);

			break;

		}



		rq->cmd[0] = GPCMD_READ_CD;

		rq->cmd[1] = 1 << 2;
@@ -2124,6 +2128,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 


		if (blk_rq_unmap_user(bio))

			ret = -EFAULT;

		blk_put_request(rq);



		if (ret)

			break;
@@ -2133,7 +2138,6 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 
		ubuf += len;

	}



	blk_put_request(rq);

	return ret;

}

drivers/scsi/device_handler/scsi_dh_hp_sw.c

+8 −4
Original line number Diff line number Diff line
@@ -107,6 +107,7 @@ static int hp_sw_tur(struct scsi_device *sdev, struct hp_sw_dh_data *h) 
	struct request *req;

	int ret;



retry:

	req = blk_get_request(sdev->request_queue, WRITE, GFP_NOIO);

	if (!req)

		return SCSI_DH_RES_TEMP_UNAVAIL;
@@ -121,7 +122,6 @@ static int hp_sw_tur(struct scsi_device *sdev, struct hp_sw_dh_data *h) 
	memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE);

	req->sense_len = 0;



retry:

	ret = blk_execute_rq(req->q, NULL, req, 1);

	if (ret == -EIO) {

		if (req->sense_len > 0) {
@@ -136,8 +136,10 @@ retry: 
		h->path_state = HP_SW_PATH_ACTIVE;

		ret = SCSI_DH_OK;

	}

	if (ret == SCSI_DH_IMM_RETRY)

	if (ret == SCSI_DH_IMM_RETRY) {

		blk_put_request(req);

		goto retry;

	}

	if (ret == SCSI_DH_DEV_OFFLINED) {

		h->path_state = HP_SW_PATH_PASSIVE;

		ret = SCSI_DH_OK;
@@ -200,6 +202,7 @@ static int hp_sw_start_stop(struct scsi_device *sdev, struct hp_sw_dh_data *h) 
	struct request *req;

	int ret, retry;



retry:

	req = blk_get_request(sdev->request_queue, WRITE, GFP_NOIO);

	if (!req)

		return SCSI_DH_RES_TEMP_UNAVAIL;
@@ -216,7 +219,6 @@ static int hp_sw_start_stop(struct scsi_device *sdev, struct hp_sw_dh_data *h) 
	req->sense_len = 0;

	retry = h->retries;



retry:

	ret = blk_execute_rq(req->q, NULL, req, 1);

	if (ret == -EIO) {

		if (req->sense_len > 0) {
@@ -231,8 +233,10 @@ retry: 
		ret = SCSI_DH_OK;



	if (ret == SCSI_DH_RETRY) {

		if (--retry)

		if (--retry) {

			blk_put_request(req);

			goto retry;

		}

		ret = SCSI_DH_IO;

	}

CRA Git | Maintained and supported by SUSTech CRA and CCSE