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Commit 00f9aee0 authored by Arun Prakash's avatar Arun Prakash
Browse files

net: qrtr: mhi_dev: Handle mhi register error case 



Handle -EEXIST error case while register state callback
with mhi device. If channel is open during registration
no callback will issue instead mhi stack return -EEXIST
to notify the client. Further state change notification
will be informed via registered callback.

Change-Id: Icf60de35d23393a0808ef90058c1108e950d02b9
Signed-off-by: default avatarArun Prakash <app@codeaurora.org>
parent 33325985

net/qrtr/mhi_dev.c

+15 −1
Original line number Diff line number Diff line
@@ -201,6 +201,7 @@ static int qrtr_mhi_dev_probe(struct platform_device *pdev) 
	struct qrtr_mhi_dev_ep *qep;

	struct device_node *node;

	int rc;

	struct mhi_dev_client_cb_data cb_data;



	qep = devm_kzalloc(&pdev->dev, sizeof(*qep), GFP_KERNEL);

	if (!qep)
@@ -227,8 +228,21 @@ static int qrtr_mhi_dev_probe(struct platform_device *pdev) 
	 */

	rc = mhi_register_state_cb(qrtr_mhi_dev_state_cb, qep,

				   QRTR_MHI_DEV_OUT);

	if (rc)

	if (rc == -EEXIST) {

		/**

		 * MHI stack will return -EEXIST if mhi channel is already

		 * opend by the host and will not invoke reqistered callback.

		 * But future state change notification will inform through

		 * registered callback.

		 */

		complete_all(&qep->out_tre);

		cb_data.user_data = (void *)qep;

		cb_data.channel = QRTR_MHI_DEV_OUT;

		cb_data.ctrl_info = MHI_STATE_CONNECTED;

		qrtr_mhi_dev_state_cb(&cb_data);

	} else if (rc) {

		return rc;

	}



	return 0;

}