media: mceusb: MCE_CMD_SETIRTIMEOUT cause strange behaviour on device

If the IR timeout is set on vid 1784 pid 0011, the device starts
behaving strangely.
Reported-by: Matthias Reichl <hias@horus.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/rc/mceusb.c

@@ -181,6 +181,7 @@ enum mceusb_model_type {
 	MCE_GEN2 = 0,		/* Most boards */
 	MCE_GEN1,
 	MCE_GEN3,
+	MCE_GEN3_BROKEN_IRTIMEOUT,
 	MCE_GEN2_TX_INV,
 	MCE_GEN2_TX_INV_RX_GOOD,
 	POLARIS_EVK,
@@ -199,6 +200,7 @@ struct mceusb_model {
 	u32 mce_gen3:1;
 	u32 tx_mask_normal:1;
 	u32 no_tx:1;
+	u32 broken_irtimeout:1;
 	/*
 	 * 2nd IR receiver (short-range, wideband) for learning mode:
 	 *     0, absent 2nd receiver (rx2)
@@ -242,6 +244,12 @@ static const struct mceusb_model mceusb_model[] = {
 		.tx_mask_normal = 1,
 		.rx2 = 2,
 	},
+	[MCE_GEN3_BROKEN_IRTIMEOUT] = {
+		.mce_gen3 = 1,
+		.tx_mask_normal = 1,
+		.rx2 = 2,
+		.broken_irtimeout = 1
+	},
 	[POLARIS_EVK] = {
 		/*
 		 * In fact, the EVK is shipped without
@@ -352,7 +360,7 @@ static const struct usb_device_id mceusb_dev_table[] = {
 	  .driver_info = MCE_GEN2_TX_INV },
 	/* Topseed eHome Infrared Transceiver */
 	{ USB_DEVICE(VENDOR_TOPSEED, 0x0011),
-	  .driver_info = MCE_GEN3 },
+	  .driver_info = MCE_GEN3_BROKEN_IRTIMEOUT },
 	/* Ricavision internal Infrared Transceiver */
 	{ USB_DEVICE(VENDOR_RICAVISION, 0x0010) },
 	/* Itron ione Libra Q-11 */
@@ -1441,8 +1449,16 @@ static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir)
 	rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
 	rc->min_timeout = US_TO_NS(MCE_TIME_UNIT);
 	rc->timeout = MS_TO_NS(100);
-	rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+	if (!mceusb_model[ir->model].broken_irtimeout) {
 		rc->s_timeout = mceusb_set_timeout;
+		rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+	} else {
+		/*
+		 * If we can't set the timeout using CMD_SETIRTIMEOUT, we can
+		 * rely on software timeouts for timeouts < 100ms.
+		 */
+		rc->max_timeout = rc->timeout;
+	}
 	if (!ir->flags.no_tx) {
 		rc->s_tx_mask = mceusb_set_tx_mask;
 		rc->s_tx_carrier = mceusb_set_tx_carrier;