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| author | Alan Stern <stern@rowland.harvard.edu> | 2010-04-20 18:40:59 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-30 20:25:10 +0400 |
| commit | 62f9cfa3ece58268b3e92ca59c23b175f86205aa (patch) | |
| tree | 5990f644a00870876cb34f0afea1012215413f47 /drivers/usb/core/generic.c | |
| parent | c3baa19b0a9b711b02cec81d9fea33b7b9628957 (diff) | |
| download | linux-62f9cfa3ece58268b3e92ca59c23b175f86205aa.tar.xz | |
USB: don't choose configs with no interfaces
This patch (as1372) fixes a bug in the routine that chooses the
default configuration to install when a new USB device is detected.
The algorithm is supposed to look for a config whose first interface
is for a non-vendor-specific class. But the way it's currently
written, it will also accept a config with no interfaces at all, which
is not very useful. (Believe it or not, such things do exist.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Andrew Victor <avictor.za@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/generic.c')
| -rw-r--r-- | drivers/usb/core/generic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c index bdf87a8414a1..2c95153c0f24 100644 --- a/drivers/usb/core/generic.c +++ b/drivers/usb/core/generic.c @@ -120,7 +120,7 @@ int usb_choose_configuration(struct usb_device *udev) * than a vendor-specific driver. */ else if (udev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC && - (!desc || desc->bInterfaceClass != + (desc && desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC)) { best = c; break; |