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drivers/video/backlight/l4f00242t03.c: check return value of regulator_enable()

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regulator_enable() is 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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jingoo Han 2013-04-29 16:17:34 -07:00 committed by Linus Torvalds
parent 8541b82745
commit ef73e632fe
1 changed files with 23 additions and 4 deletions
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27
drivers/video/backlight/l4f00242t03.c
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@ -51,14 +51,33 @@ 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");
regulator_disable(priv->io_reg);
return;
}
ret = regulator_enable(priv->core_reg);
if (ret) {
dev_err(&spi->dev, "failed to enable the core regulator.\n");
regulator_disable(priv->io_reg);
return;
}
l4f00242t03_reset(pdata->reset_gpio);