linux-kernel - [PATCH 2/5] soundwire: bus: reset slave

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Date:   Tue, 24 Nov 2020 09:33:15 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com, hui.wang@...onical.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        mengdong.lin@...el.com, bard.liao@...el.com
Subject: [PATCH 2/5] soundwire: bus: reset slave_notify status at each loop

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

The code loops multiple times to deal with pending interrupts, but we
never reset the slave_notify status.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/bus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 45131b9f5080..d6e646521819 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -1425,7 +1425,7 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 	u8 clear = 0, bit, port_status[15] = {0};
 	int port_num, stat, ret, count = 0;
 	unsigned long port;
-	bool slave_notify = false;
+	bool slave_notify;
 	u8 sdca_cascade = 0;
 	u8 buf, buf2[2], _buf, _buf2[2];
 	bool parity_check;
@@ -1467,6 +1467,8 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 	}
 
 	do {
+		slave_notify = false;
+
 		/*
 		 * Check parity, bus clash and Slave (impl defined)
 		 * interrupt
-- 
2.17.1