linux-kernel - [PATCH] soc: qcom: smd: Correct fBLOCKREADINTR handling

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Date:	Mon, 24 Aug 2015 13:38:46 -0700
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Andy Gross <agross@...eaurora.org>
CC:	<linux-arm-msm@...r.kernel.org>, <linux-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] soc: qcom: smd: Correct fBLOCKREADINTR handling

fBLOCKREADINTR is masking the notification from the remote and should
hence be cleared while we're waiting the tx fifo to drain. Also change
the reset state to mask the notification, as send is the only use case
where we're interested in it.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
---
 drivers/soc/qcom/smd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index 327adcf117c1..cb7bc55d981a 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -310,7 +310,7 @@ static void qcom_smd_channel_reset(struct qcom_smd_channel *channel)
 	SET_TX_CHANNEL_INFO(channel, fHEAD, 0);
 	SET_TX_CHANNEL_INFO(channel, fTAIL, 0);
 	SET_TX_CHANNEL_INFO(channel, fSTATE, 1);
-	SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0);
+	SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1);
 	SET_TX_CHANNEL_INFO(channel, head, 0);
 	SET_TX_CHANNEL_INFO(channel, tail, 0);
 
@@ -681,7 +681,7 @@ int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len)
 			goto out;
 		}
 
-		SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1);
+		SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0);
 
 		ret = wait_event_interruptible(channel->fblockread_event,
 				       qcom_smd_get_tx_avail(channel) >= tlen ||
@@ -689,7 +689,7 @@ int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len)
 		if (ret)
 			goto out;
 
-		SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0);
+		SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1);
 	}
 
 	SET_TX_CHANNEL_INFO(channel, fTAIL, 0);
-- 
1.8.2.2

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