usb-storage: redo incorrect reads

Some USB mass-storage devices have bugs that cause them not to handle
the first READ(10) command they receive correctly.  The Corsair
Padlock v2 returns completely bogus data for its first read (possibly
it returns the data in encrypted form even though the device is
supposed to be unlocked).  The Feiya SD/SDHC card reader fails to
complete the first READ(10) command after it is plugged in or after a
new card is inserted, returning a status code that indicates it thinks
the command was invalid, which prevents the kernel from retrying the
read.

Since the first read of a new device or a new medium is for the
partition sector, the kernel is unable to retrieve the device's
partition table.  Users have to manually issue an "hdparm -z" or
"blockdev --rereadpt" command before they can access the device.

This patch (as1470) works around the problem.  It adds a new quirk
flag, US_FL_INVALID_READ10, indicating that the first READ(10) should
always be retried immediately, as should any failing READ(10) commands
(provided the preceding READ(10) command succeeded, to avoid getting
stuck in a loop).  The patch also adds appropriate unusual_devs
entries containing the new flag.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Sven Geggus <sven-usbst@geggus.net>
Tested-by: Paul Hartman <paul.hartman+linux@gmail.com>
CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
CC: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index c1602b8c5594..ccff3483eebc 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1114,6 +1114,16 @@ UNUSUAL_DEV( 0x090c, 0x1132, 0x0000, 0xffff,
                 USB_SC_DEVICE, USB_PR_DEVICE, NULL,
                 US_FL_FIX_CAPACITY ),
 
+/* Reported by Paul Hartman <paul.hartman+linux@gmail.com>
+ * This card reader returns "Illegal Request, Logical Block Address
+ * Out of Range" for the first READ(10) after a new card is inserted.
+ */
+UNUSUAL_DEV(  0x090c, 0x6000, 0x0100, 0x0100,
+                "Feiya",
+                "SD/SDHC Card Reader",
+                USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+                US_FL_INITIAL_READ10 ),
+
 /* This Pentax still camera is not conformant
  * to the USB storage specification: -
  * - It does not like the INQUIRY command. So we must handle this command
@@ -1888,6 +1898,15 @@ UNUSUAL_DEV( 0x1908, 0x3335, 0x0200, 0x0200,
                 USB_SC_DEVICE, USB_PR_DEVICE, NULL,
                 US_FL_NO_READ_DISC_INFO ),
 
+/* Reported by Sven Geggus <sven-usbst@geggus.net>
+ * This encrypted pen drive returns bogus data for the initial READ(10).
+ */
+UNUSUAL_DEV(  0x1b1c, 0x1ab5, 0x0200, 0x0200,
+                "Corsair",
+                "Padlock v2",
+                USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+                US_FL_INITIAL_READ10 ),
+
 /* Patch by Richard Schütz <r.schtz@t-online.de>
  * This external hard drive enclosure uses a JMicron chip which
  * needs the US_FL_IGNORE_RESIDUE flag to work properly. */