linux-kernel - [PATCH 1/6] soundwire: qcom: reinit broadcast completion

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Message-Id: <20221026110210.6575-2-srinivas.kandagatla@linaro.org>
Date:   Wed, 26 Oct 2022 12:02:05 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     vkoul@...nel.org, yung-chuan.liao@...ux.intel.com
Cc:     andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        srinivas.kandagatla@...aro.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: [PATCH 1/6] soundwire: qcom: reinit broadcast completion

For some reason we never reinit the broadcast completion, there is a
danger that broadcast commands could be treated as completed by driver
from previous complete status.
Fix this by reinitializing the completion before sending a broadcast command.

Fixes: ddea6cf7b619 ("soundwire: qcom: update register read/write routine")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/soundwire/qcom.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index b33d5db494a5..8f1a1eb017a2 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -344,6 +344,9 @@ static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data,
 	if (swrm_wait_for_wr_fifo_avail(swrm))
 		return SDW_CMD_FAIL_OTHER;
 
+	if (cmd_id == SWR_BROADCAST_CMD_ID)
+		reinit_completion(&swrm->broadcast);
+
 	/* Its assumed that write is okay as we do not get any status back */
 	swrm->reg_write(swrm, SWRM_CMD_FIFO_WR_CMD, val);
 
-- 
2.21.0