Merge "msm: mhi: Enable clearing outstanding acks in MHI" (447e5fb1) · Commits · e / devices / android_kernel_sony_msm8994

drivers/platform/msm/mhi/mhi_main.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -1123,6 +1123,8 @@ static enum MHI_STATUS reset_chan_cmd(struct mhi_device_ctxt *mhi_dev_ctxt,
		struct mhi_chan_ctxt *chan_ctxt;
		struct mhi_client_handle *client_handle = NULL;
		struct mutex *chan_mutex;
		int pending_el = 0;
		struct mhi_ring *ring;

		MHI_TRB_GET_INFO(CMD_TRB_CHID, cmd_pkt, chan);

		@@ -1139,6 +1141,19 @@ static enum MHI_STATUS reset_chan_cmd(struct mhi_device_ctxt *mhi_dev_ctxt,
		chan_ctxt = &mhi_dev_ctxt->mhi_ctrl_seg->mhi_cc_list[chan];
		mhi_log(MHI_MSG_INFO, "Processed cmd reset event\n");

		/*
		* If outbound elements are pending, they must be cleared since
		* they will never be acked after a channel reset.
		*/
		ring = &mhi_dev_ctxt->mhi_local_chan_ctxt[chan];
		if (chan % 2 == 0)
		get_nr_enclosed_el(ring, ring->rp, ring->wp, &pending_el);

		mhi_log(MHI_MSG_INFO, "Decrementing chan %d out acks by %d.\n",
		chan, pending_el);

		atomic_sub(pending_el, &mhi_dev_ctxt->counters.outbound_acks);

		/* Reset the local channel context */
		local_chan_ctxt->rp = local_chan_ctxt->base;
		local_chan_ctxt->wp = local_chan_ctxt->base;