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Date: Mon, 30 Jan 2017 11:26:39 +0100 From: Johan Hovold <johan@...nel.org> To: Jiri Kosina <jikos@...nel.org> Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>, linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org> Subject: [PATCH 2/2] HID: cp2112: fix gpio-callback error handling In case of a zero-length report, the gpio direction_input callback would currently return success instead of an errno. Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@...r.kernel.org> # 4.9 Signed-off-by: Johan Hovold <johan@...nel.org> --- drivers/hid/hid-cp2112.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c index 3e0b6bad29f2..b22d0f83f8e3 100644 --- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -213,7 +213,7 @@ static int cp2112_gpio_direction_input(struct gpio_chip *chip, unsigned offset) exit: mutex_unlock(&dev->lock); - return ret <= 0 ? ret : -EIO; + return ret < 0 ? ret : -EIO; } static void cp2112_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -- 2.10.2
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