linux-kernel - [RFC PATCH 1/2] mailbox: imx: Clear GIEn bit at shutdown

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Message-Id: <20190610141609.17559-2-daniel.baluta@nxp.com>
Date:   Mon, 10 Jun 2019 22:16:08 +0800
From:   daniel.baluta@....com
To:     jassisinghbrar@...il.com, o.rempel@...gutronix.de
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, linux-imx@....com,
        kernel@...gutronix.de, festevam@...il.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        aisheng.dong@....com, Daniel Baluta <daniel.baluta@....com>
Subject: [RFC PATCH 1/2] mailbox: imx: Clear GIEn bit at shutdown

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

GIEn is enabled at startup for RX doorbell mailboxes so
we need to clear the bit at shutdown in order to avoid
leaving the interrupt line enabled.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 drivers/mailbox/imx-mailbox.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 25be8bb5e371..9f74dee1a58c 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -217,8 +217,8 @@ 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_rmw(priv, 0, IMX_MU_xCR_TIEn(cp->idx) |
+		       IMX_MU_xCR_RIEn(cp->idx) | IMX_MU_xCR_GIEn(cp->idx));
 
 	free_irq(priv->irq, chan);
 }
-- 
2.17.1