Patch "HID: cp2112: fix broken gpio_direction_input callback" has been added to the 4.9-stable tree

Patch "HID: cp2112: fix broken gpio_direction_input callback" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    HID: cp2112: fix broken gpio_direction_input callback

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     hid-cp2112-fix-broken-gpio_direction_input-callback.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Dec 18 14:12:34 CET 2017
From: S�bastien Szymanski <sebastien.szymanski@armadeus.com>
Date: Fri, 10 Nov 2017 10:01:43 +0100
Subject: HID: cp2112: fix broken gpio_direction_input callback

From: S�bastien Szymanski <sebastien.szymanski@armadeus.com>


[ Upstream commit 7da85fbf1c87d4f73621e0e7666a3387497075a9 ]

When everything goes smoothly, ret is set to 0 which makes the function
to return EIO error.

Fixes: 8e9faa15469e ("HID: cp2112: fix gpio-callback error handling")
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/hid-cp2112.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -188,6 +188,8 @@ static int cp2112_gpio_direction_input(s
 				 HID_REQ_GET_REPORT);
 	if (ret != CP2112_GPIO_CONFIG_LENGTH) {
 		hid_err(hdev, "error requesting GPIO config: %d\n", ret);
+		if (ret >= 0)
+			ret = -EIO;
 		goto exit;
 	}
 
@@ -197,8 +199,10 @@ static int cp2112_gpio_direction_input(s
 	ret = hid_hw_raw_request(hdev, CP2112_GPIO_CONFIG, buf,
 				 CP2112_GPIO_CONFIG_LENGTH, HID_FEATURE_REPORT,
 				 HID_REQ_SET_REPORT);
-	if (ret < 0) {
+	if (ret != CP2112_GPIO_CONFIG_LENGTH) {
 		hid_err(hdev, "error setting GPIO config: %d\n", ret);
+		if (ret >= 0)
+			ret = -EIO;
 		goto exit;
 	}
 
@@ -206,7 +210,7 @@ static int cp2112_gpio_direction_input(s
 
 exit:
 	mutex_unlock(&dev->lock);
-	return ret < 0 ? ret : -EIO;
+	return ret;
 }
 
 static void cp2112_gpio_set(struct gpio_chip *chip, unsigned offset, int value)


Patches currently in stable-queue which might be from sebastien.szymanski@armadeus.com are

queue-4.9/clk-imx6-refine-hdmi_isfr-s-parent-to-make-hdmi-work-on-i.mx6-socs-w-o-vpu.patch
queue-4.9/hid-cp2112-fix-broken-gpio_direction_input-callback.patch