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HID: cp2112: fix gpio-callback error handling

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In case of a zero-length report, the gpio direction_input callback would
currently return success instead of an errno.

Fixes: 1ffb3c40ff ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable <stable@vger.kernel.org>     # 4.9
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Johan Hovold 2017-01-30 11:26:39 +01:00 committed by Jiri Kosina
parent 7a7b5df84b
commit 8e9faa1546
1 changed files with 1 additions and 1 deletions
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2
drivers/hid/hid-cp2112.c
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@ -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)