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| author | James Bottomley <James.Bottomley@SteelEye.com> | 2007-12-02 20:10:40 +0300 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-12 03:22:50 +0300 |
| commit | 001aac257cf8adbe90cdcba6e07f8d12dfc8fa6b (patch) | |
| tree | 0eb6294049245e05f47fdb76e3f878c78c015d88 /drivers/scsi/sd.c | |
| parent | 4a03d90e35bc5273d27301fa669d4b2103196f94 (diff) | |
| download | linux-001aac257cf8adbe90cdcba6e07f8d12dfc8fa6b.tar.xz | |
[SCSI] sd,sr: add early detection of medium not present
The current scsi_test_unit_ready() is updated to return sense code
information (in struct scsi_sense_hdr). The sd and sr drivers are
changed to interpret the sense code return asc 0x3a as no media and
adjust the device status accordingly.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 18343a6acd8e..212f6bcfd457 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -736,6 +736,7 @@ static int sd_media_changed(struct gendisk *disk) { struct scsi_disk *sdkp = scsi_disk(disk); struct scsi_device *sdp = sdkp->device; + struct scsi_sense_hdr *sshdr = NULL; int retval; SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); @@ -766,8 +767,11 @@ static int sd_media_changed(struct gendisk *disk) */ retval = -ENODEV; - if (scsi_block_when_processing_errors(sdp)) - retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES); + if (scsi_block_when_processing_errors(sdp)) { + sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); + retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, + sshdr); + } /* * Unable to test, unit probably not ready. This usually @@ -775,7 +779,9 @@ static int sd_media_changed(struct gendisk *disk) * and we will figure it out later once the drive is * available again. */ - if (retval) { + if (retval || (scsi_sense_valid(sshdr) && + /* 0x3a is medium not present */ + sshdr->asc == 0x3a)) { set_media_not_present(sdkp); retval = 1; goto out; @@ -794,6 +800,7 @@ out: if (retval != sdkp->previous_state) sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); sdkp->previous_state = retval; + kfree(sshdr); return retval; } |