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USB: cdc_acm: Fix oops when Droids MuIn LCD is connected

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The Droids MuIn LCD operates like a serial remote terminal.
Data received are displayed directly on the LCD. This patch
fixes the kernel null pointer oops when it is plugged in.

Add NO_DATA_INTERFACE quirk to tell the driver that "control"
and "data" interfaces are not separated for this device, which
prevents dereferencing a null pointer in the device probe code.

Signed-off-by: Erik Slagter <erik@slagter.name>
Signed-off-by: Maxin B. John <maxin.john@gmail.com>
Tested-by: Erik Slagter <erik@slagter.name>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Erik Slagter 2011-05-11 12:06:55 +02:00 • committed by Greg Kroah-Hartman
parent a9df304cf7
commit fd5054c169
2 changed files with 12 additions and 2 deletions
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1
drivers/usb/class/cdc-acm.h
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@ -126,3 +126,4 @@ struct acm {
#define SINGLE_RX_URB 2
#define NO_CAP_LINE 4
#define NOT_A_MODEM 8
#define NO_DATA_INTERFACE 16