| commit | 4df9c291640da8992e146076f57a8e563c449e31 | |
| author | Bjørn Mork <bjorn@mork.no> | |
| Fri, 20 Jan 2012 00:49:57 +0000 (20 01:49 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Fri, 3 Feb 2012 17:19:02 +0000 (3 09:19 -0800) | ||
| tree | a87727e7ddcb71f9af1652ff60716564fd84b6c3 | treesnapshot (tar.gz zip) |
| parent | 5256ca41663c848ac24783a5161a97730a21696c | commitdiff |
USB: cdc-wdm: Avoid hanging on interface with no USB_CDC_DMM_TYPE
commit 15699e6fafc3a90e5fdc2ef30555a04dee62286f upstream.
The probe does not strictly require the USB_CDC_DMM_TYPE
descriptor, which is a good thing as it makes the driver
usable on non-conforming interfaces. A user could e.g.
bind to it to a CDC ECM interface by using the new_id and
bind sysfs files. But this would fail with a 0 buffer length
due to the missing descriptor.
Fix by defining a reasonable fallback size: The minimum
device receive buffer size required by the CDC WMC standard,
revision 1.1
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 15699e6fafc3a90e5fdc2ef30555a04dee62286f upstream.
The probe does not strictly require the USB_CDC_DMM_TYPE
descriptor, which is a good thing as it makes the driver
usable on non-conforming interfaces. A user could e.g.
bind to it to a CDC ECM interface by using the new_id and
bind sysfs files. But this would fail with a 0 buffer length
due to the missing descriptor.
Fix by defining a reasonable fallback size: The minimum
device receive buffer size required by the CDC WMC standard,
revision 1.1
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/usb/class/cdc-wdm.c | diffblobblamehistory |