Please ignore this one. I build tested these patches in series and turned out it can't be build independently because configNr is deprecated. I'll resend this patch.
Nevertheless I'd like to get a feedback on the real problem this patch is trying to solve here. Thanks, Amit Pundir On 9 February 2016 at 01:37, Amit Pundir <amit.pun...@linaro.org> wrote: > From: xerox_lin <xerox_...@htc.com> > > When rndis data transfer is in progress, some Windows7 Host PC is not > sending the GET_ENCAPSULATED_RESPONSE command for receiving the response > for the previous SEND_ENCAPSULATED_COMMAND processed. > > The rndis function driver appends each response for the > SEND_ENCAPSULATED_COMMAND in a queue. As the above process got corrupted, > the Host sends a REMOTE_NDIS_RESET_MSG command to do a soft-reset. > As the rndis response queue is not freed, the previous response is sent > as a part of this REMOTE_NDIS_RESET_MSG's reset response and the Host > blocks any more Rndis transfers. > > Hence free the rndis response queue as a part of this soft-reset so that > the current response for REMOTE_NDIS_RESET_MSG is sent properly during the > response command. > > Cc: Felipe Balbi <ba...@kernel.org> > Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> > Cc: Andrzej Pietrasiewicz <andrze...@samsung.com> > Cc: Badhri Jagan Sridharan <bad...@google.com> > Cc: Android Kernel Team <kernel-t...@android.com> > Cc: John Stultz <john.stu...@linaro.org> > Cc: Sumit Semwal <sumit.sem...@linaro.org> > Signed-off-by: Rajkumar Raghupathy <rag...@codeaurora.org> > Signed-off-by: Xerox Lin <xerox_...@htc.com> > [pundir: cherry-picked this patch from AOSP experimental/android-4.4 tree.] > Signed-off-by: Amit Pundir <amit.pun...@linaro.org> > --- > Cherry-picked this patch from AOSP common/experimental/android-4.4 tree. > I could not find upstream submission history for this patch, so my > apologies in advance if this has already been NACKed before. > > drivers/usb/gadget/function/rndis.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/usb/gadget/function/rndis.c > b/drivers/usb/gadget/function/rndis.c > index 70d3917..27163e8 100644 > --- a/drivers/usb/gadget/function/rndis.c > +++ b/drivers/usb/gadget/function/rndis.c > @@ -681,6 +681,13 @@ static int rndis_reset_response(struct rndis_params > *params, > rndis_reset_cmplt_type *resp; > rndis_resp_t *r; > > + u32 length; > + u8 *xbuf; > + > + /* drain the response queue */ > + while ((xbuf = rndis_get_next_response(configNr, &length))) > + rndis_free_response(configNr, xbuf); > + > r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type)); > if (!r) > return -ENOMEM; > -- > 1.9.1 >
