Messages in this thread Patch in this message | | | From | Jingoo Han <> | Subject | [PATCH] backlight: l4f00242t03: check return value of regulator_enable() | Date | Mon, 11 Mar 2013 12:58:41 +0900 |
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The regulator_enable() was marked as as __must_check, therefore, the return value of regulator_enable() should be checked. Also, this patch checks return value of regulator_set_voltage().
Signed-off-by: Jingoo Han <jg1.han@samsung.com> --- drivers/video/backlight/l4f00242t03.c | 27 ++++++++++++++++++++++----- 1 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index fb61557..8d54c3c 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -51,14 +51,31 @@ static void l4f00242t03_lcd_init(struct spi_device *spi) struct l4f00242t03_pdata *pdata = spi->dev.platform_data; struct l4f00242t03_priv *priv = spi_get_drvdata(spi); const u16 cmd[] = { 0x36, param(0), 0x3A, param(0x60) }; + int ret; dev_dbg(&spi->dev, "initializing LCD\n"); - regulator_set_voltage(priv->io_reg, 1800000, 1800000); - regulator_enable(priv->io_reg); + ret = regulator_set_voltage(priv->io_reg, 1800000, 1800000); + if (ret) { + dev_err(&spi->dev, "failed to set the IO regulator voltage.\n"); + return; + } + ret = regulator_enable(priv->io_reg); + if (ret) { + dev_err(&spi->dev, "failed to enable the IO regulator.\n"); + return; + } - regulator_set_voltage(priv->core_reg, 2800000, 2800000); - regulator_enable(priv->core_reg); + ret = regulator_set_voltage(priv->core_reg, 2800000, 2800000); + if (ret) { + dev_err(&spi->dev, "failed to set the core regulator voltage.\n"); + return; + } + ret = regulator_enable(priv->core_reg); + if (ret) { + dev_err(&spi->dev, "failed to enable the core regulator.\n"); + return; + } l4f00242t03_reset(pdata->reset_gpio); -- 1.7.2.5
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