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authorMassimiliano Ghilardi <massimiliano.ghilardi@gmail.com>2007-09-04 22:53:43 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2007-09-11 07:48:16 -0700
commitc4766560e4d3e2a9c10d69d7d618dc2b0082a3dc (patch)
tree009743518dc19edcd5c85e614af9bb1d5f6b2a0d /drivers/firewire
parent9374b9fd6cef7f8b75a543d044c5b0925aae08cd (diff)
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>
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