Patch "drm/panel: rpi-touchscreen: propagate errors in rpi_touchscreen_i2c_read()" has been added to the 4.15-stable tree

Patch "drm/panel: rpi-touchscreen: propagate errors in rpi_touchscreen_i2c_read()" has been added to the 4.15-stable tree

[gregkh]

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

    drm/panel: rpi-touchscreen: propagate errors in rpi_touchscreen_i2c_read()

to the 4.15-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:
     drm-panel-rpi-touchscreen-propagate-errors-in-rpi_touchscreen_i2c_read.patch
and it can be found in the queue-4.15 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 Fri Mar 16 15:10:48 CET 2018
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 20 Oct 2017 03:28:45 +0300
Subject: drm/panel: rpi-touchscreen: propagate errors in rpi_touchscreen_i2c_read()

From: Dan Carpenter <dan.carpenter@oracle.com>


[ Upstream commit 85b4587f8e94143bafb8b6a4003a5187b9a8753d ]

There is one caller which checks whether rpi_touchscreen_i2c_read()
returns negative error codes.  Currently it can't because negative
error codes are truncated to u8, but that's easy to fix if we change the
type to int.

Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20171020002845.kar2wg7gqxg7tzqi@mwanda
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
index 890fd6ff397c..d964d454e4ae 100644
--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
@@ -221,7 +221,7 @@ static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)
 	return container_of(panel, struct rpi_touchscreen, base);
 }
 
-static u8 rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg)
+static int rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg)
 {
 	return i2c_smbus_read_byte_data(ts->i2c, reg);
 }
-- 
2.16.2



Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.15/media-cpia2-fix-a-couple-off-by-one-bugs.patch
queue-4.15/crypto-chelsio-fix-an-error-code-in-chcr_hash_dma_map.patch
queue-4.15/drm-panel-rpi-touchscreen-propagate-errors-in-rpi_touchscreen_i2c_read.patch
queue-4.15/bnxt_en-uninitialized-variable-in-bnxt_tc_parse_actions.patch
queue-4.15/power-supply-sbs-message-double-left-shift-bug-in-sbsm_select.patch
queue-4.15/asoc-nuc900-fix-a-loop-timeout-test.patch