linux-kernel - [PATCH] mailbox: qcom-ipcc: Support multiple channels for a given client

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Date:   Thu, 23 Feb 2023 14:13:18 +0800
From:   Huang Yiwei <quic_hyiwei@...cinc.com>
To:     <mani@...nel.org>, <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <jassisinghbrar@...il.com>
CC:     Huang Yiwei <quic_hyiwei@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_satyap@...cinc.com>, <quic_aiquny@...cinc.com>,
        <quic_gurus@...cinc.com>
Subject: [PATCH] mailbox: qcom-ipcc: Support multiple channels for a given client

Recently a new use case where two signals for the same protocol and
client is needed, that means there will be more than one channel
for a mbox node. Current driver only supports one channel, so need
to remove the limitation and let the driver find every channel
correctly.

Signed-off-by: Huang Yiwei <quic_hyiwei@...cinc.com>
---
 drivers/mailbox/qcom-ipcc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c
index 7e27acf6c0cc..367658af089e 100644
--- a/drivers/mailbox/qcom-ipcc.c
+++ b/drivers/mailbox/qcom-ipcc.c
@@ -226,11 +226,9 @@ static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc,
 		for (j = 0; j < i; j++) {
 			ret = of_parse_phandle_with_args(client_dn, "mboxes",
 						"#mbox-cells", j, &curr_ph);
-			of_node_put(curr_ph.np);
-			if (!ret && curr_ph.np == controller_dn) {
+			if (!ret && curr_ph.np == controller_dn)
 				ipcc->num_chans++;
-				break;
-			}
+			of_node_put(curr_ph.np);
 		}
 	}
 
-- 
2.17.1