1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0201-drm-panel-rpi-touchscreen-propagate-errors-in-rpi_to.patch b/target/linux/brcm2708/patches-4.14/950-0201-drm-panel-rpi-touchscreen-propagate-errors-in-rpi_to.patch
new file mode 100644
index 0000000000..923cdf2439
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0201-drm-panel-rpi-touchscreen-propagate-errors-in-rpi_to.patch
@@ -0,0 +1,32 @@
+From 5659b5b9d46a236f53217e6686209863960442e3 Mon Sep 17 00:00:00 2001
+From: Dan Carpenter <dan.carpenter@oracle.com>
+Date: Fri, 20 Oct 2017 03:28:45 +0300
+Subject: [PATCH 201/454] drm/panel: rpi-touchscreen: propagate errors in
+ rpi_touchscreen_i2c_read()
+
+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>
+(cherry picked from commit 85b4587f8e94143bafb8b6a4003a5187b9a8753d)
+---
+ drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
++++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+@@ -243,7 +243,7 @@ static struct rpi_touchscreen *panel_to_
+ 	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->bridge_i2c, reg);
+ }