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Commit afe46893 authored by Sujeev Dias's avatar Sujeev Dias
Browse files

mhi: mhi_uci: add support for shutdown and system error notification 



Add support to handle system error and shutdown
notifications from mhi host.

CRs-Fixed: 1097560
Change-Id: Ied6c907586aa4dc2ed3b1a7c19305877144b3b21
Signed-off-by: default avatarSujeev Dias <sdias@codeaurora.org>
parent 4c332132

drivers/platform/msm/mhi_uci/mhi_uci.c

+35 −1
Original line number Diff line number Diff line
@@ -1185,9 +1185,43 @@ static void uci_xfer_cb(struct mhi_cb_info *cb_info) 
		mutex_unlock(&chan_attr->chan_lock);

		wake_up(&chan_attr->wq);

		break;

	case MHI_CB_SYS_ERROR:

	case MHI_CB_MHI_SHUTDOWN:

	case MHI_CB_MHI_DISABLED:

		uci_log(uci_handle->uci_ipc_log, UCI_DBG_INFO,

			"MHI disabled CB received\n");

			"MHI disabled CB received 0x%x for chan:%d\n",

			cb_info->cb_reason, cb_info->chan);



		chan_attr = (cb_info->chan % 2) ? &uci_handle->in_attr :

			&uci_handle->out_attr;

		mutex_lock(&chan_attr->chan_lock);

		chan_attr->enabled = false;

		/* we disable entire handler by grabbing only one lock */

		uci_handle->enabled = false;

		mutex_unlock(&chan_attr->chan_lock);

		wake_up(&chan_attr->wq);



		/*

		 * if it's ctrl channel clear the resource now

		 * otherwise during file close we will release the

		 * resources

		 */

		if (uci_handle == uci_handle->uci_ctxt->ctrl_client &&

		    chan_attr == &uci_handle->out_attr) {

			struct uci_buf *itr, *tmp;



			mutex_lock(&chan_attr->chan_lock);

			atomic_set(&uci_handle->out_attr.avail_pkts, 0);

			atomic_set(&uci_handle->out_pkt_pend_ack, 0);

			list_for_each_entry_safe(itr, tmp, &chan_attr->buf_head,

						 node) {

				list_del(&itr->node);

				kfree(itr->data);

			}

			atomic_set(&uci_handle->completion_ack, 0);

			INIT_LIST_HEAD(&uci_handle->out_attr.buf_head);

			mutex_unlock(&chan_attr->chan_lock);

		}

		break;

	case MHI_CB_XFER:

		if (!cb_info->result) {