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| author | Alan Stern <stern@rowland.harvard.edu> | 2006-02-09 15:26:18 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-02-27 23:24:09 -0600 |
| commit | 1bfc5d9d5eb8e1a2efacc306bc55c248ed259a8e (patch) | |
| tree | 503f6cd4f481e16db7c3b00326e07b0dca8942e8 | |
| parent | 8cac814501677e9f6a824cf4d423122ac8d67fcb (diff) | |
| download | kernel_samsung_smdk4412-1bfc5d9d5eb8e1a2efacc306bc55c248ed259a8e.zip kernel_samsung_smdk4412-1bfc5d9d5eb8e1a2efacc306bc55c248ed259a8e.tar.gz kernel_samsung_smdk4412-1bfc5d9d5eb8e1a2efacc306bc55c248ed259a8e.tar.bz2 | |
[SCSI] Recognize missing LUNs for non-standard devices
Some non-standard SCSI targets or protocols, such as USB UFI, report "no
LUN present" by setting the Peripheral Device Type to 0x1f and the
Peripheral Qualifier to 0 (not 3 as the standard requires) in the INQUIRY
response. This patch (as650b) adds a new target flag and code to
accomodate such targets.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 13 | ||||
| -rw-r--r-- | include/scsi/scsi_device.h | 5 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 803c7b9..94b86d5 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -853,6 +853,19 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget, goto out_free_result; } + /* + * Non-standard SCSI targets may set the PDT to 0x1f (unknown or + * no device type) instead of using the Peripheral Qualifier to + * indicate that no LUN is present. For example, USB UFI does this. + */ + if (starget->pdt_1f_for_no_lun && (result[0] & 0x1f) == 0x1f) { + SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO + "scsi scan: peripheral device type" + " of 31, no device added\n")); + res = SCSI_SCAN_TARGET_PRESENT; + goto out_free_result; + } + res = scsi_add_lun(sdev, result, &bflags); if (res == SCSI_SCAN_LUN_PRESENT) { if (bflags & BLIST_KEY) { diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index cde84b3..8d77da9 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -167,7 +167,10 @@ struct scsi_target { unsigned int channel; unsigned int id; /* target id ... replace * scsi_device.id eventually */ - unsigned long create:1; /* signal that it needs to be added */ + unsigned int create:1; /* signal that it needs to be added */ + unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */ + /* means no lun present */ + char scsi_level; void *hostdata; /* available to low-level driver */ unsigned long starget_data[0]; /* for the transport */ |