4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Icenowy Zheng <icen...@aosc.io>
commit c5603d2fdb424849360fe7e3f8c1befc97571b8c upstream.
Currently the code will set US_FL_SANE_SENSE flag unconditionally if
device claims SPC3+, however we should allow US_FL_BAD_SENSE flag to
prevent this behavior, because SMI SM3350 UFS-USB bridge controller,
which claims SPC4, will show strange behavior with 96-byte sense
(put the chip into a wrong state that cannot read/write anything).
Check the presence of US_FL_BAD_SENSE when assuming US_FL_SANE_SENSE on
SPC4+ devices.
Signed-off-by: Icenowy Zheng <icen...@aosc.io>
Cc: stable <sta...@vger.kernel.org>
Acked-by: Alan Stern <st...@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/usb/storage/scsiglue.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -223,8 +223,12 @@ static int slave_configure(struct scsi_d
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)
+ /*
+ * assume SPC3 or latter devices support sense size > 18
+ * unless US_FL_BAD_SENSE quirk is specified.
+ */
+ if (sdev->scsi_level > SCSI_SPC_2 &&
+ !(us->fflags & US_FL_BAD_SENSE))
us->fflags |= US_FL_SANE_SENSE;
/* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable
