gma500@ Fix backlight range error
If we go out of range we break the pm counts on the error path Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -157,14 +157,12 @@ static int device_backlight_init(struct drm_device *dev)
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value /= bl_max_freq;
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value /= blc_pwm_precision_factor;
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if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ)
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return -ERANGE;
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if (gma_power_begin(dev, false)) {
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if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ)
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return -ERANGE;
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else {
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REG_WRITE(BLC_PWM_CTL2,
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(0x80000000 | REG_READ(BLC_PWM_CTL2)));
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REG_WRITE(BLC_PWM_CTL, value | (value << 16));
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}
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REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2)));
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REG_WRITE(BLC_PWM_CTL, value | (value << 16));
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gma_power_end(dev);
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}
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return 0;
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