USB: cdc-wdm: support back-to-back USB_CDC_NOTIFY_RESPONSE_AVAILABLE notifications
authorGreg Suarez <gpsuarez2512@gmail.com>
Tue, 29 Oct 2013 17:29:10 +0000 (10:29 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 Oct 2013 00:02:41 +0000 (17:02 -0700)
commit73e06865ead1bec8d1c179e1c647dc77adde9116
tree01e167bd8665aab09998994b83338f5d790377b0
parent32e24930fb71c47a1366325b6f139e039cacaca4
USB: cdc-wdm: support back-to-back USB_CDC_NOTIFY_RESPONSE_AVAILABLE notifications

Some MBIM devices send back-to-back USB_CDC_NOTIFY_RESPONSE_AVAILABLE notifications
when sending a message over multiple fragments or when there are unsolicited
messages available.

Count up the number of USB_CDC_NOTIFY_RESPONSE_AVAILABLE notifications received
and decrement the count and submit the urb for the next response each time userspace
completes a read the response.

Signed-off-by: Greg Suarez <gsuarez@smithmicro.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/class/cdc-wdm.c