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| author | Krzysztof Opasiak <k.opasiak@samsung.com> | 2016-05-05 11:46:05 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-05-31 10:02:53 +0300 |
| commit | f1bddbb3de60872acc2446eee97dbeb0a6d57acb (patch) | |
| tree | fb0786404eafa9f6e3dd7d8c840ea1e17700dd40 /drivers/usb/gadget/configfs.c | |
| parent | 1a695a905c18548062509178b98bc91e67510864 (diff) | |
| download | linux-f1bddbb3de60872acc2446eee97dbeb0a6d57acb.tar.xz | |
usb: gadget: Fix binding to UDC via configfs interface
By default user could store only valid UDC name in configfs UDC
attr by doing:
echo $UDC_NAME > UDC
Commit (855ed04 "usb: gadget: udc-core: independent registration of
gadgets and gadget drivers") broke this behavior and allowed to store
any arbitrary string in UDC file and udc core was waiting for such
controller to appear.
echo "any arbitrary string here" > UDC
This commit fix this by adding a flag which prevents configfs
gadget from being added to list of pending drivers if UDC with
given name has not been found.
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget/configfs.c')
| -rw-r--r-- | drivers/usb/gadget/configfs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index b6f60ca8a035..70cf3477f951 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -1401,6 +1401,7 @@ static const struct usb_gadget_driver configfs_driver_template = { .owner = THIS_MODULE, .name = "configfs-gadget", }, + .match_existing_only = 1, }; static struct config_group *gadgets_make( |