--- zzzz-none-000/linux-3.10.107/drivers/media/tuners/tuner-i2c.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/tuners/tuner-i2c.h	2021-02-04 17:41:59.000000000 +0000
@@ -33,7 +33,8 @@
 	char *name;
 };
 
-static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len)
+static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props,
+				      unsigned char *buf, int len)
 {
 	struct i2c_msg msg = { .addr = props->addr, .flags = 0,
 			       .buf = buf, .len = len };
@@ -42,7 +43,8 @@
 	return (ret == 1) ? len : ret;
 }
 
-static inline int tuner_i2c_xfer_recv(struct tuner_i2c_props *props, char *buf, int len)
+static inline int tuner_i2c_xfer_recv(struct tuner_i2c_props *props,
+				      unsigned char *buf, int len)
 {
 	struct i2c_msg msg = { .addr = props->addr, .flags = I2C_M_RD,
 			       .buf = buf, .len = len };
@@ -52,8 +54,8 @@
 }
 
 static inline int tuner_i2c_xfer_send_recv(struct tuner_i2c_props *props,
-					   char *obuf, int olen,
-					   char *ibuf, int ilen)
+					   unsigned char *obuf, int olen,
+					   unsigned char *ibuf, int ilen)
 {
 	struct i2c_msg msg[2] = { { .addr = props->addr, .flags = 0,
 				    .buf = obuf, .len = olen },