diff options
| author | Jingoo Han <jg1.han@samsung.com> | 2013-04-29 16:17:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 18:28:15 -0700 |
| commit | ef73e632fe48b97e67cbff339f9e7d30535d682f (patch) | |
| tree | 1fb4445ee953536863d04d985360cc7f587265cb | |
| parent | 8541b827451e0dd907f4a0088213b8982347ce3a (diff) | |
| download | linux-ef73e632fe48b97e67cbff339f9e7d30535d682f.tar.bz2 | |
drivers/video/backlight/l4f00242t03.c: check return value of regulator_enable()
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>
| -rw-r--r-- | drivers/video/backlight/l4f00242t03.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index fb6155771326..a35a38c709cf 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -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); |