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Commit 924b28ab authored by Sujeev Dias's avatar Sujeev Dias
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mhi_bus: core: notify clients when dropping queued packets 



MHI clients not required to keep a submitted buffer list, so bus
master must callback client with all queued buffer during
channel reset.

CRs-Fixed: 2221018
Change-Id: I2ac035f6de5951b9656514213b8e03e559d88e95
Signed-off-by: default avatarSujeev Dias <sdias@codeaurora.org>
parent 0c3c8033

drivers/bus/mhi/core/mhi_main.c

+8 −1
Original line number Diff line number Diff line
@@ -1166,6 +1166,7 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan) 
	struct mhi_ring *ev_ring, *buf_ring, *tre_ring;

	unsigned long flags;

	int chan = mhi_chan->chan;

	struct mhi_result result;



	/* nothing to reset, client don't queue buffers */

	if (mhi_chan->offload_ch)
@@ -1210,6 +1211,8 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan) 
	/* reset any pending buffers */

	buf_ring = &mhi_chan->buf_ring;

	tre_ring = &mhi_chan->tre_ring;

	result.transaction_status = -ENOTCONN;

	result.bytes_xferd = 0;

	while (tre_ring->rp != tre_ring->wp) {

		struct mhi_buf_info *buf_info = buf_ring->rp;
@@ -1221,8 +1224,12 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan) 
		mhi_del_ring_element(mhi_cntrl, buf_ring);

		mhi_del_ring_element(mhi_cntrl, tre_ring);



		if (mhi_chan->pre_alloc)

		if (mhi_chan->pre_alloc) {

			kfree(buf_info->cb_buf);

		} else {

			result.buf_addr = buf_info->cb_buf;

			mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);

		}

	}



	read_unlock_bh(&mhi_cntrl->pm_lock);