Commits
Bin Liu committed dbac5d07d13
usb: musb: host: don't start next rx urb if current one failed urb->status is set when endpoint csr RXSTALL, H_ERROR, DATAERROR or INCOMPRX bit is set. Those bits mean a broken pipe, so don't start next urb when any of these bits is set by checking urb->status. To minimize the risk of regression, only do so for RX, until we have a test case to understand the behavior of TX. The patch fixes system freeze issue caused by repeatedly invoking RX ISR while removing a usb uart device connected to a hub, in which case the hub has no chance to report the disconnect event due to the kernel is busy in processing the RX interrupt flooding. Fix checkpatch complaint (qh != NULL) as while. Reported-by: Max Uvarov <muvarov@gmail.com> Tested-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>