linux-kernel - [PATCH 5.4 119/191] mailbox: imx: Clear the right interrupts at shutdown

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Date:   Thu,  2 Jan 2020 23:06:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Oleksij Rempel <o.rempel@...gutronix.de>,
        Daniel Baluta <daniel.baluta@....com>,
        Richard Zhu <hongxing.zhu@....com>,
        Dong Aisheng <aisheng.dong@....com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 119/191] mailbox: imx: Clear the right interrupts at shutdown

From: Daniel Baluta <daniel.baluta@....com>

[ Upstream commit 5f0af07e89199ac51cdd4f25bc303bdc703f4e9c ]

Make sure to only clear enabled interrupts keeping count
of the connection type.

Suggested-by: Oleksij Rempel <o.rempel@...gutronix.de>
Signed-off-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Richard Zhu <hongxing.zhu@....com>
Reviewed-by: Dong Aisheng <aisheng.dong@....com>
Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mailbox/imx-mailbox.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 9f74dee1a58c..d28bbd47ff88 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -217,8 +217,19 @@ static void imx_mu_shutdown(struct mbox_chan *chan)
 	if (cp->type == IMX_MU_TYPE_TXDB)
 		tasklet_kill(&cp->txdb_tasklet);
 
-	imx_mu_xcr_rmw(priv, 0, IMX_MU_xCR_TIEn(cp->idx) |
-		       IMX_MU_xCR_RIEn(cp->idx) | IMX_MU_xCR_GIEn(cp->idx));
+	switch (cp->type) {
+	case IMX_MU_TYPE_TX:
+		imx_mu_xcr_rmw(priv, 0, IMX_MU_xCR_TIEn(cp->idx));
+		break;
+	case IMX_MU_TYPE_RX:
+		imx_mu_xcr_rmw(priv, 0, IMX_MU_xCR_RIEn(cp->idx));
+		break;
+	case IMX_MU_TYPE_RXDB:
+		imx_mu_xcr_rmw(priv, 0, IMX_MU_xCR_GIEn(cp->idx));
+		break;
+	default:
+		break;
+	}
 
 	free_irq(priv->irq, chan);
 }
-- 
2.20.1