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USB: UAS: introduce a quirk to set no_write_same

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commit 8010622c86ca5bb44bc98492f5968726fc7c7a21 upstream.

UAS does not share the pessimistic assumption storage is making that
devices cannot deal with WRITE_SAME.  A few devices supported by UAS,
are reported to not deal well with WRITE_SAME. Those need a quirk.

Add it to the device that needs it.

Reported-by: David C. Partridge <david.partridge@perdrix.co.uk>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201209152639.9195-1-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oliver Neukum 2020-12-09 16:26:39 +01:00 committed by Greg Kroah-Hartman
parent d769a22dc0
commit 2440c1cb25
5 changed files with 14 additions and 2 deletions
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1
Documentation/admin-guide/kernel-parameters.txt
View File

@ -5663,6 +5663,7 @@
device);
j = NO_REPORT_LUNS (don't use report luns
command, uas only);
k = NO_SAME (do not use WRITE_SAME, uas only)
l = NOT_LOCKABLE (don't try to lock and
unlock ejectable media, not on uas);
m = MAX_SECTORS_64 (don't transfer more

3
drivers/usb/storage/uas.c
View File

@ -867,6 +867,9 @@ static int uas_slave_configure(struct scsi_device *sdev)
if (devinfo->flags & US_FL_NO_READ_CAPACITY_16)
sdev->no_read_capacity_16 = 1;
/* Some disks cannot handle WRITE_SAME */
if (devinfo->flags & US_FL_NO_SAME)
sdev->no_write_same = 1;
/*
* Some disks return the total number of blocks in response
* to READ CAPACITY rather than the highest block number.

7
drivers/usb/storage/unusual_uas.h
View File

@ -35,12 +35,15 @@ UNUSUAL_DEV(0x054c, 0x087d, 0x0000, 0x9999,
USB_SC_DEVICE, USB_PR_DEVICE, NULL,
US_FL_NO_REPORT_OPCODES),
/* Reported-by: Julian Groß <julian.g@posteo.de> */
/*
* Initially Reported-by: Julian Groß <julian.g@posteo.de>
* Further reports David C. Partridge <david.partridge@perdrix.co.uk>
*/
UNUSUAL_DEV(0x059f, 0x105f, 0x0000, 0x9999,
"LaCie",
"2Big Quadra USB3",
USB_SC_DEVICE, USB_PR_DEVICE, NULL,
US_FL_NO_REPORT_OPCODES),
US_FL_NO_REPORT_OPCODES | US_FL_NO_SAME),
/*
* Apricorn USB3 dongle sometimes returns "USBSUSBSUSBS" in response to SCSI

3
drivers/usb/storage/usb.c
View File

@ -541,6 +541,9 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
case 'j':
f |= US_FL_NO_REPORT_LUNS;
break;
case 'k':
f |= US_FL_NO_SAME;
break;
case 'l':
f |= US_FL_NOT_LOCKABLE;
break;

2
include/linux/usb_usual.h
View File

@ -84,6 +84,8 @@
/* Cannot handle REPORT_LUNS */ \
US_FLAG(ALWAYS_SYNC, 0x20000000) \
/* lies about caching, so always sync */ \
US_FLAG(NO_SAME, 0x40000000) \
/* Cannot handle WRITE_SAME */ \
#define US_FLAG(name, value) US_FL_##name = value ,
enum { US_DO_ALL_FLAGS };