linux-kernel - [PATCH 04/24] soc: mediatek: pwrap: add missing check on rstc

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Date:   Sat, 23 Mar 2019 22:15:52 +0100
From:   Fabien Parent <fparent@...libre.com>
To:     matthias.bgg@...il.com, robh+dt@...nel.org, mark.rutland@....com
Cc:     sean.wang@...nel.org, ryder.lee@...iatek.com,
        hsin-hsiung.wang@...iatek.com, wenzhen.yu@...iatek.com,
        chaotian.jing@...iatek.com, yong.mao@...iatek.com,
        jjian.zhou@...iatek.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-mmc@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-clk@...r.kernel.org, stephane.leprovost@...iatek.com,
        Fabien Parent <fparent@...libre.com>
Subject: [PATCH 04/24] soc: mediatek: pwrap: add missing check on rstc

The variable rstc is set only when the SoC PWRAP have the
PWRAP_CAP_RESET capability. Check whether rstc is set before
using it to avoid errors.

Signed-off-by: Fabien Parent <fparent@...libre.com>
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 8236a6c87e19..b3ba2301f569 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -1478,7 +1478,8 @@ static int pwrap_init(struct pmic_wrapper *wrp)
 {
 	int ret;
 
-	reset_control_reset(wrp->rstc);
+	if (wrp->rstc)
+		reset_control_reset(wrp->rstc);
 	if (wrp->rstc_bridge)
 		reset_control_reset(wrp->rstc_bridge);
 
-- 
2.20.1