diff options
| author | Thomas Pugliese <thomas.pugliese@gmail.com> | 2013-08-15 21:21:30 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-16 04:35:31 +0400 |
| commit | 6d33f7bb8c3863e54f8bdede0a2bf97a3585ac20 (patch) | |
| tree | b183a4ab10a38356822932cffced7d96e745ebff /drivers/usb/wusbcore/wa-rpipe.c | |
| parent | 224563b6ce034b82f8511969d9496113da34fb2c (diff) | |
| download | linux-6d33f7bb8c3863e54f8bdede0a2bf97a3585ac20.tar.xz | |
USB: WUSBCORE: clear RPIPE stall for control endpoints
When the HWA encounters a STALL on a control endpoint, it should clear the
RPIPE_STALL feature on the RPIPE before processing the next transfer
request. Otherwise, all transfer requests on that endpoint after the
first STALL will fail because the RPIPE is still in the halted state.
This also removes the unneccessary call to spin_lock_irqsave for a nested
lock that was present in the first patch.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/wusbcore/wa-rpipe.c')
| -rw-r--r-- | drivers/usb/wusbcore/wa-rpipe.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wa-rpipe.c b/drivers/usb/wusbcore/wa-rpipe.c index 9a595c1ed867..fd4f1ce6256a 100644 --- a/drivers/usb/wusbcore/wa-rpipe.c +++ b/drivers/usb/wusbcore/wa-rpipe.c @@ -527,3 +527,24 @@ void rpipe_ep_disable(struct wahc *wa, struct usb_host_endpoint *ep) mutex_unlock(&wa->rpipe_mutex); } EXPORT_SYMBOL_GPL(rpipe_ep_disable); + +/* Clear the stalled status of an RPIPE. */ +void rpipe_clear_feature_stalled(struct wahc *wa, struct usb_host_endpoint *ep) +{ + struct wa_rpipe *rpipe; + + mutex_lock(&wa->rpipe_mutex); + rpipe = ep->hcpriv; + if (rpipe != NULL) { + u16 index = le16_to_cpu(rpipe->descr.wRPipeIndex); + + usb_control_msg( + wa->usb_dev, usb_rcvctrlpipe(wa->usb_dev, 0), + USB_REQ_CLEAR_FEATURE, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_RPIPE, + RPIPE_STALL, index, NULL, 0, 1000); + } + mutex_unlock(&wa->rpipe_mutex); +} +EXPORT_SYMBOL_GPL(rpipe_clear_feature_stalled); + |