Hi,
Vegard Nossum <vegard.nossum@xxxxxxxxxx> writes:
> On 02/08/2016 01:15 PM, Marek Szyprowski wrote:
>> Gadgetfs driver called usb_gadget_unregister_driver unconditionally, even
>> if it didn't register it earlier due to other failures. This patch fixes
>> this.
>>
>> Reported-by: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
>> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
>> ---
>> drivers/usb/gadget/legacy/inode.c | 7 +++++--
>> 1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
>> index 7a62a2f7bc18..cde6a2133c90 100644
>> --- a/drivers/usb/gadget/legacy/inode.c
>> +++ b/drivers/usb/gadget/legacy/inode.c
>> @@ -130,7 +130,8 @@ struct dev_data {
>> setup_can_stall : 1,
>> setup_out_ready : 1,
>> setup_out_error : 1,
>> - setup_abort : 1;
>> + setup_abort : 1,
>> + gadget_registered : 1;
>> unsigned setup_wLength;
>>
>> /* the rest is basically write-once */
>> @@ -1179,7 +1180,8 @@ dev_release (struct inode *inode, struct file *fd)
>>
>> /* closing ep0 === shutdown all */
>>
>> - usb_gadget_unregister_driver (&gadgetfs_driver);
>> + if (dev->gadget_registered)
>> + usb_gadget_unregister_driver (&gadgetfs_driver);
>>
>> /* at this point "good" hardware has disconnected the
>> * device from USB; the host won't see it any more.
>> @@ -1825,6 +1827,7 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
>> * kick in after the ep0 descriptor is closed.
>> */
>> value = len;
>> + dev->gadget_registered = true;
>> }
>> return value;
>>
>>
>
> That (along with the first patch) fixes the problem! Thanks.
>
> It also seems to have fixed another crash I was seeing with
> req->complete == NULL in usb_gadget_giveback_request().
please resend both patches with proper Acks and Tested-bys so I can
apply them.
--
balbi
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