xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: introduce a quirk for false cache reporting

Browse Source 
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>
This commit is contained in:
Oliver Neukum
2016-09-12 15:19:41 +02:00
committed by Greg Kroah-Hartman
parent 6406c3d226
commit 050bc4e846
5 changed files with 24 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/storage/usb.c
View File

@@ -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 */
}
}