[patch 43/57] USB: storage: Avoid I/O errors when issuing SCSIioctls to JMicron USB/ATA bridge

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Phil Dibowitz <phil@xxxxxxxx>

commit 3030ca4cf4abbdd2dd850a14d20e9fca5937ffb5 upstream

USB: storage: Avoid I/O errors when issuing SCSI ioctls to JMicron USB/ATA bridge

Here's the patch that implements the fix you suggested to avoid the
I/O errors that I was running into with my new USB enclosure with a
JMicron USB/ATA bridge, while issuing scsi-io USN or other such
queries used by Fedora's mkinitrd.
http://bugzilla.kernel.org/show_bug.cgi?id=9638#c85


/proc/bus/usb/devices:
T:  Bus=01 Lev=01 Prnt=01 Port=07 Cnt=04 Dev#=  5 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=152d ProdID=2329 Rev= 1.00
S:  Manufacturer=JMicron
S:  Product=USB to ATA/ATAPI Bridge
S:  SerialNumber=DE5088854FFF
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

(patch applied and retested on a modified 2.6.27.2-libre.24.rc1.fc10)

Signed-off-by: Phil Dibowitz <phil@xxxxxxxx>
Cc: Alexandre Oliva <oliva@xxxxxxxxxxxxxxxxx>
Cc: Chuck Ebbert <cebbert@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/usb/storage/unusual_devs.h |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1745,6 +1745,15 @@ UNUSUAL_DEV(  0x14cd, 0x6600, 0x0201, 0x
 		US_SC_DEVICE, US_PR_DEVICE, NULL,
 		US_FL_IGNORE_RESIDUE ),
 
+/* Reported by Alexandre Oliva <oliva@xxxxxxxxxxxxxxxxx>
+ * JMicron responds to USN and several other SCSI ioctls with a
+ * residue that causes subsequent I/O requests to fail.  */
+UNUSUAL_DEV(  0x152d, 0x2329, 0x0100, 0x0100,
+	        "JMicron",
+	        "USB to ATA/ATAPI Bridge",
+	        US_SC_DEVICE, US_PR_DEVICE, NULL,
+	        US_FL_IGNORE_RESIDUE ),
+
 /* Reported by Robert Schedel <r.schedel@xxxxxxxx>
  * Note: this is a 'super top' device like the above 14cd/6600 device */
 UNUSUAL_DEV(  0x1652, 0x6600, 0x0201, 0x0201,

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