diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2014-07-15 12:49:17 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-17 09:19:13 -0700 |
| commit | d1988d080f8522b44d08ac38c9e5f6a881968fce (patch) | |
| tree | 1493698659cf78c66ee0a6da463812491482531e /drivers/scsi | |
| parent | 2fc0acc5c14a0fd2973d8af261017df4f6d2fa3f (diff) | |
scsi: add a blacklist flag which enables VPD page inquiries
commit c1d40a527e885a40bb9ea6c46a1b1145d42b66a0 upstream.
Despite supporting modern SCSI features some storage devices continue to
claim conformance to an older version of the SPC spec. This is done for
compatibility with legacy operating systems.
Linux by default will not attempt to read VPD pages on devices that
claim SPC-2 or older. Introduce a blacklist flag that can be used to
trigger VPD page inquiries on devices that are known to support them.
Reported-by: KY Srinivasan <kys@microsoft.com>
Tested-by: KY Srinivasan <kys@microsoft.com>
Reviewed-by: KY Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/sd.c | 5 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index bfad3586d914..17b08db224e8 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -950,7 +950,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, sdev->eh_timeout = SCSI_DEFAULT_EH_TIMEOUT; - if (*bflags & BLIST_SKIP_VPD_PAGES) + if (*bflags & BLIST_TRY_VPD_PAGES) + sdev->try_vpd_pages = 1; + else if (*bflags & BLIST_SKIP_VPD_PAGES) sdev->skip_vpd_pages = 1; transport_configure_device(&sdev->sdev_gendev); diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 36d1a23f14be..e8abb731c7ec 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2686,6 +2686,11 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) static int sd_try_extended_inquiry(struct scsi_device *sdp) { + /* Attempt VPD inquiry if the device blacklist explicitly calls + * for it. + */ + if (sdp->try_vpd_pages) + return 1; /* * Although VPD inquiries can go to SCSI-2 type devices, * some USB ones crash on receiving them, and the pages |