diff options
author | Oliver Neukum <oneukum@suse.com> | 2016-09-12 15:19:41 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-13 08:08:24 +0200 |
commit | 050bc4e846af24e77af82d0fa5f718e0919d15a4 (patch) | |
tree | 9a670fd070e7d58478639602cb133509826329d2 /drivers/usb/storage | |
parent | 6406c3d226374c28d452b11db3b5ac241ce26191 (diff) | |
download | op-kernel-dev-050bc4e846af24e77af82d0fa5f718e0919d15a4.zip op-kernel-dev-050bc4e846af24e77af82d0fa5f718e0919d15a4.tar.gz |
scsi: introduce a quirk for false cache reporting
Some SATA to USB bridges fail to cooperate with some
drives resulting in no cache being present being reported
to the host. That causes the host to skip sending
a command to synchronize caches. That causes data loss
when the drive is powered down.
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/storage')
-rw-r--r-- | drivers/usb/storage/scsiglue.c | 8 | ||||
-rw-r--r-- | drivers/usb/storage/unusual_devs.h | 7 | ||||
-rw-r--r-- | drivers/usb/storage/usb.c | 6 |
3 files changed, 20 insertions, 1 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 33eb923..8cd2926 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -296,6 +296,14 @@ static int slave_configure(struct scsi_device *sdev) if (us->fflags & US_FL_BROKEN_FUA) sdev->broken_fua = 1; + /* Some even totally fail to indicate a cache */ + if (us->fflags & US_FL_ALWAYS_SYNC) { + /* don't read caching information */ + sdev->skip_ms_page_8 = 1; + sdev->skip_ms_page_3f = 1; + /* assume sync is needed */ + sdev->wce_default_on = 1; + } } else { /* diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index aa35392..af3c7ee 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -338,6 +338,13 @@ UNUSUAL_DEV( 0x046b, 0xff40, 0x0100, 0x0100, USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_NO_WP_DETECT), +/* Reported by Egbert Eich <eich@suse.com> */ +UNUSUAL_DEV( 0x0480, 0xd010, 0x0100, 0x9999, + "Toshiba", + "External USB 3.0", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, + US_FL_ALWAYS_SYNC), + /* Patch submitted by Philipp Friedrich <philipp@void.at> */ UNUSUAL_DEV( 0x0482, 0x0100, 0x0100, 0x0100, "Kyocera", diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index c8afd2d..2cba13a 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -498,7 +498,8 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags) US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 | US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE | US_FL_NO_ATA_1X | US_FL_NO_REPORT_OPCODES | - US_FL_MAX_SECTORS_240 | US_FL_NO_REPORT_LUNS); + US_FL_MAX_SECTORS_240 | US_FL_NO_REPORT_LUNS | + US_FL_ALWAYS_SYNC); p = quirks; while (*p) { @@ -581,6 +582,9 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags) case 'w': f |= US_FL_NO_WP_DETECT; break; + case 'y': + f |= US_FL_ALWAYS_SYNC; + break; /* Ignore unrecognized flag characters */ } } |