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由 Pavel Machek 提交于
On spitz (& similar) machines, if battery is running low, backlight needs to be limited to lower step. Unfortunately, current code uses &= for limiting, turning backlight off completely for some backlight settings. Fix that. Signed-off-by: NPavel Machek <pavel@ucw.cz> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>
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