From 71f9f08103cb02f3d5bfad91cb570dcd2d8ed0cb Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Wed, 12 Apr 2017 08:34:03 -0700 Subject: [PATCH] Input: lpc32xx_ts - check for clk_prepare_enable() error clk_prepare_enable() may fail, so we better check its return value and propagate it in the case of error. Signed-off-by: Fabio Estevam Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/lpc32xx_ts.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c index e0baa7de4102..4eb31ec10b18 100644 --- a/drivers/input/touchscreen/lpc32xx_ts.c +++ b/drivers/input/touchscreen/lpc32xx_ts.c @@ -142,11 +142,14 @@ static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc) clk_disable_unprepare(tsc->clk); } -static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc) +static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc) { u32 tmp; + int err; - clk_prepare_enable(tsc->clk); + err = clk_prepare_enable(tsc->clk); + if (err) + return err; tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP; @@ -184,15 +187,15 @@ static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc) /* Enable automatic ts event capture */ tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN); + + return 0; } static int lpc32xx_ts_open(struct input_dev *dev) { struct lpc32xx_tsc *tsc = input_get_drvdata(dev); - lpc32xx_setup_tsc(tsc); - - return 0; + return lpc32xx_setup_tsc(tsc); } static void lpc32xx_ts_close(struct input_dev *dev) -- 2.20.1