USB Mass Storage: limit "Rockchip ROCK MP3" device (071b:3203) max I/O to 64 sectors per command
The MP3/MP4/AVI player "Rockchip ROCK MP3" is seen as a USB disk, but fails
if more than 128 sectors (64kB) are sent or requested in a single read or write
command, and disconnects from the USB bus.
Typical kernel log showing the problem is:
usb 3-1: reset high speed USB device using ehci_hcd and address 6
usb 3-1: reset high speed USB device using ehci_hcd and address 6
sd 14:0:0:0: [sdb] Result: hostbyte=0x07 driverbyte=0x00
end_request: I/O error, dev sdb, sector 32
sd 14:0:0:0: [sdb] Result: hostbyte=0x07 driverbyte=0x00
end_request: I/O error, dev sdb, sector 32
usb 3-1: USB disconnect, address 6
This patch works around the device limitation by adding "Rockchip ROCK MP3"
to unusual USB devices list and limiting data transfers to 64 sectors (32kB)
per command.
Tested on 2.6.23-rc5 (amd64).
Signed-off-by: Massimiliano Ghilardi <massimiliano.ghilardi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index da52d10..c6b78ba 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -904,6 +904,22 @@
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_FIX_CAPACITY ),
+/* Reported by Massimiliano Ghilardi <massimiliano.ghilardi@gmail.com>
+ * This USB MP3/AVI player device fails and disconnects if more than 128
+ * sectors (64kB) are read/written in a single command, and may be present
+ * at least in the following products:
+ * "Magnex Digital Video Panel DVP 1800"
+ * "MP4 AIGO 4GB SLOT SD"
+ * "Teclast TL-C260 MP3"
+ * "i.Meizu PMP MP3/MP4"
+ * "Speed MV8 MP4 Audio Player"
+ */
+UNUSUAL_DEV( 0x071b, 0x3203, 0x0100, 0x0100,
+ "RockChip",
+ "ROCK MP3",
+ US_SC_DEVICE, US_PR_DEVICE, NULL,
+ US_FL_MAX_SECTORS_64),
+
/* Reported by Olivier Blondeau <zeitoun@gmail.com> */
UNUSUAL_DEV( 0x0727, 0x0306, 0x0100, 0x0100,
"ATMEL",