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scsi: scsi_ioctl: Consolidate the START STOP UNIT handling 

Factor out a helper for the various flavors of START STOP UNIT command
ioctls.

Link: https://lore.kernel.org/r/20210724072033.1284840-22-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2021-07-24 09:20:30 +02:00 committed by Martin K. Petersen
parent a9705477f5
commit 5147618743
1 changed files with 10 additions and 38 deletions
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48
drivers/scsi/scsi_ioctl.c
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@ -218,31 +218,14 @@ static int sg_emulated_host(struct request_queue *q, int __user *p)
return put_user(1, p);
}
/* Send basic block requests */
static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
int cmd, int data)
static int scsi_send_start_stop(struct scsi_device *sdev, int data)
{
struct request *rq;
int err;
u8 cdb[MAX_COMMAND_SIZE] = { };
rq = blk_get_request(q, REQ_OP_DRV_OUT, 0);
if (IS_ERR(rq))
return PTR_ERR(rq);
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
scsi_req(rq)->cmd[0] = cmd;
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
blk_execute_rq(bd_disk, rq, 0);
err = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
return err;
}
static inline int blk_send_start_stop(struct request_queue *q,
struct gendisk *bd_disk, int data)
{
return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
cdb[0] = START_STOP;
cdb[4] = data;
return ioctl_internal_command(sdev, cdb, START_STOP_TIMEOUT,
NORMAL_RETRIES);
}
/*
@ -883,7 +866,6 @@ int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
int cmd, void __user *arg)
{
struct request_queue *q = sdev->request_queue;
char scsi_cmd[MAX_COMMAND_SIZE];
struct scsi_sense_hdr sense_hdr;
int error;
@ -936,9 +918,9 @@ int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
case CDROM_SEND_PACKET:
return scsi_cdrom_send_packet(q, disk, mode, arg);
case CDROMCLOSETRAY:
return blk_send_start_stop(q, disk, 0x03);
return scsi_send_start_stop(sdev, 3);
case CDROMEJECT:
return blk_send_start_stop(q, disk, 0x02);
return scsi_send_start_stop(sdev, 2);
case SCSI_IOCTL_GET_IDLUN: {
struct scsi_idlun v = {
.dev_id = (sdev->id & 0xff)
@ -963,19 +945,9 @@ int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
return scsi_test_unit_ready(sdev, IOCTL_NORMAL_TIMEOUT,
NORMAL_RETRIES, &sense_hdr);
case SCSI_IOCTL_START_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 1;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
return scsi_send_start_stop(sdev, 1);
case SCSI_IOCTL_STOP_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
return scsi_send_start_stop(sdev, 0);
case SCSI_IOCTL_GET_PCI:
return scsi_ioctl_get_pci(sdev, arg);
case SG_SCSI_RESET: