redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

usb: uas: add support for more quirk flags 

commit 42d1c6d4a0 upstream.

The hope that UAS devices would be less broken than old style storage
devices has turned out to be unfounded. Make UAS support more of the
quirk flags of the old driver.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Oliver Neukum 2018-08-09 16:03:37 +02:00 committed by Greg Kroah-Hartman
parent 0845f2a477
commit 182d130384
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/usb/storage/uas.c
View File

@ -842,6 +842,27 @@ static int uas_slave_configure(struct scsi_device *sdev)
sdev->skip_ms_page_8 = 1;
sdev->wce_default_on = 1;
}
/*
* Some disks return the total number of blocks in response
* to READ CAPACITY rather than the highest block number.
* If this device makes that mistake, tell the sd driver.
*/
if (devinfo->flags & US_FL_FIX_CAPACITY)
sdev->fix_capacity = 1;
/*
* Some devices don't like MODE SENSE with page=0x3f,
* which is the command used for checking if a device
* is write-protected. Now that we tell the sd driver
* to do a 192-byte transfer with this command the
* majority of devices work fine, but a few still can't
* handle it. The sd driver will simply assume those
* devices are write-enabled.
*/
if (devinfo->flags & US_FL_NO_WP_DETECT)
sdev->skip_ms_page_3f = 1;
scsi_change_queue_depth(sdev, devinfo->qdepth - 2);
return 0;
}