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Date: Sun, 31 May 2020 11:17:41 +0800 From: Dinghao Liu <dinghao.liu@....edu.cn> To: dinghao.liu@....edu.cn, kjlu@....edu Cc: Dong Aisheng <aisheng.dong@....com>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>, linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH] [v2] i2c: imx-lpi2c: Fix runtime PM imbalance on error pm_runtime_get_sync() increments the runtime PM usage counter even the call returns an error code. Thus a pairing decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn> --- Changelog: v2: - Use pm_runtime_put_noidle() instead of pm_runtime_put_autosuspend(). --- drivers/i2c/busses/i2c-imx-lpi2c.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c index 94743ba581fe..bdee02dff284 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -260,8 +260,10 @@ static int lpi2c_imx_master_enable(struct lpi2c_imx_struct *lpi2c_imx) int ret; ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_noidle(lpi2c_imx->adapter.dev.parent); return ret; + } temp = MCR_RST; writel(temp, lpi2c_imx->base + LPI2C_MCR); -- 2.17.1
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