diff options
| author | Oliver Neukum <oneukum@suse.de> | 2013-10-14 15:24:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-16 13:32:04 -0700 |
| commit | 32c37fc30c52508711ea6a108cfd5855b8a07176 (patch) | |
| tree | 0e27849089be2e0f12bbcab665062e2f7d2454a0 /drivers/usb/storage/scsiglue.c | |
| parent | fd8573f5828873343903215f203f14dc82de397c (diff) | |
| download | lwn-32c37fc30c52508711ea6a108cfd5855b8a07176.tar.gz lwn-32c37fc30c52508711ea6a108cfd5855b8a07176.zip | |
usb-storage: add quirk for mandatory READ_CAPACITY_16
Some USB drive enclosures do not correctly report an
overflow condition if they hold a drive with a capacity
over 2TB and are confronted with a READ_CAPACITY_10.
They answer with their capacity modulo 2TB.
The generic layer cannot cope with that. It must be told
to use READ_CAPACITY_16 from the beginning.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 94d75edef77f..18509e6c21ab 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -211,8 +211,11 @@ static int slave_configure(struct scsi_device *sdev) /* * Many devices do not respond properly to READ_CAPACITY_16. * Tell the SCSI layer to try READ_CAPACITY_10 first. + * However some USB 3.0 drive enclosures return capacity + * modulo 2TB. Those must use READ_CAPACITY_16 */ - sdev->try_rc_10_first = 1; + if (!(us->fflags & US_FL_NEEDS_CAP16)) + sdev->try_rc_10_first = 1; /* assume SPC3 or latter devices support sense size > 18 */ if (sdev->scsi_level > SCSI_SPC_2) |