From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Hovold Subject: [PATCH 2/2] HID: cp2112: fix gpio-callback error handling Date: Mon, 30 Jan 2017 11:26:39 +0100 Message-ID: <20170130102639.3832-2-johan@kernel.org> References: <20170130102235.3691-1-johan@kernel.org> <20170130102639.3832-1-johan@kernel.org> Return-path: In-Reply-To: <20170130102639.3832-1-johan@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Jiri Kosina Cc: Benjamin Tissoires , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold List-Id: linux-input@vger.kernel.org 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 # 4.9 Signed-off-by: Johan Hovold --- 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