disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/media/usb/dvb-usb-v2/af9035.c
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@@ -269,6 +269,7 @@
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 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
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 	struct state *state = d_to_priv(d);
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 	int ret;
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+	u32 reg;
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 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
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 		return -EAGAIN;
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@@ -321,8 +322,10 @@
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 			ret = -EOPNOTSUPP;
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 		} else if ((msg[0].addr == state->af9033_i2c_addr[0]) ||
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 			   (msg[0].addr == state->af9033_i2c_addr[1])) {
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+			if (msg[0].len < 3 || msg[1].len < 1)
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+				return -EOPNOTSUPP;
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 			/* demod access via firmware interface */
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-			u32 reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 |
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+			reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 |
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 					msg[0].buf[2];
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 			if (msg[0].addr == state->af9033_i2c_addr[1])
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@@ -380,17 +383,16 @@
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 			ret = -EOPNOTSUPP;
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 		} else if ((msg[0].addr == state->af9033_i2c_addr[0]) ||
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 			   (msg[0].addr == state->af9033_i2c_addr[1])) {
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+			if (msg[0].len < 3)
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+				return -EOPNOTSUPP;
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 			/* demod access via firmware interface */
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-			u32 reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 |
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+			reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 |
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 					msg[0].buf[2];
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 			if (msg[0].addr == state->af9033_i2c_addr[1])
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 				reg |= 0x100000;
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-			ret = (msg[0].len >= 3) ? af9035_wr_regs(d, reg,
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-							         &msg[0].buf[3],
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-							         msg[0].len - 3)
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-					        : -EOPNOTSUPP;
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+			ret = af9035_wr_regs(d, reg, &msg[0].buf[3], msg[0].len - 3);
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 		} else {
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 			/* I2C write */
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 			u8 buf[MAX_XFER_SIZE];