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scsi: fix the type for well known LUs 

Some devices may respond with wrong type for well-known logical units.
This patch forces well-known type for devices which doesn't report it
correct.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Subhash Jadavani 2014-09-25 15:32:19 +03:00 committed by Christoph Hellwig
parent db525fce95
commit 45341ca3fc
2 changed files with 14 additions and 0 deletions
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13
drivers/scsi/scsi_scan.c
View File

@ -815,6 +815,19 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
} else {
sdev->type = (inq_result[0] & 0x1f);
sdev->removable = (inq_result[1] & 0x80) >> 7;
/*
* some devices may respond with wrong type for
* well-known logical units. Force well-known type
* to enumerate them correctly.
*/
if (scsi_is_wlun(sdev->lun) && sdev->type != TYPE_WLUN) {
sdev_printk(KERN_WARNING, sdev,
"%s: correcting incorrect peripheral device type 0x%x for W-LUN 0x%16xhN\n",
__func__, sdev->type, (unsigned int)sdev->lun);
sdev->type = TYPE_WLUN;
}
}
if (sdev->type == TYPE_RBC || sdev->type == TYPE_ROM) {

1
include/scsi/scsi.h
View File

@ -333,6 +333,7 @@ static inline int scsi_status_is_good(int status)
#define TYPE_RBC 0x0e
#define TYPE_OSD 0x11
#define TYPE_ZBC 0x14
#define TYPE_WLUN 0x1e /* well-known logical unit */
#define TYPE_NO_LUN 0x7f
/* SCSI protocols; these are taken from SPC-3 section 7.5 */