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[SCSI] sd: change to auto suspend mode

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Uses block layer runtime pm helper functions in
scsi_runtime_suspend/resume for devices that take advantage of it.

Remove scsi_autopm_* from sd open/release path and check_events path.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Lin Ming
2013-03-23 11:42:28 +08:00
committed by James Bottomley
parent 9b21493c45
commit 6df339a51e
2 changed files with 72 additions and 25 deletions
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13
drivers/scsi/sd.c
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@@ -1121,10 +1121,6 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
sdev = sdkp->device;
retval = scsi_autopm_get_device(sdev);
if (retval)
goto error_autopm;
/*
* If the device is in error recovery, wait until it is done.
* If the device is offline, then disallow any access to it.
@@ -1169,8 +1165,6 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
return 0;
error_out:
scsi_autopm_put_device(sdev);
error_autopm:
scsi_disk_put(sdkp);
return retval;
}
@@ -1205,7 +1199,6 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
* XXX is followed by a "rmmod sd_mod"?
*/
scsi_autopm_put_device(sdev);
scsi_disk_put(sdkp);
return 0;
}
@@ -1367,14 +1360,9 @@ static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
retval = -ENODEV;
if (scsi_block_when_processing_errors(sdp)) {
retval = scsi_autopm_get_device(sdp);
if (retval)
goto out;
sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL);
retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
sshdr);
scsi_autopm_put_device(sdp);
}
/* failed to execute TUR, assume media not present */
@@ -2839,6 +2827,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
sdp->removable ? "removable " : "");
blk_pm_runtime_init(sdp->request_queue, dev);
scsi_autopm_put_device(sdp);
put_device(&sdkp->dev);
}