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Commit c6a3ea57 authored by Sean Young's avatar Sean Young Committed by Mauro Carvalho Chehab
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[media] iguanair: intermittent initialization failure 



On cold boot the device does not initialize until the first packet is
received, and that packet is not processed.

Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent d0aab656

drivers/media/rc/iguanair.c

+15 −10
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ struct iguanair { 
	char phys[64];

};



#define CMD_NOP			0x00

#define CMD_GET_VERSION		0x01

#define CMD_GET_BUFSIZE		0x11

#define CMD_GET_FEATURES	0x10
@@ -196,6 +197,10 @@ static void iguanair_irq_out(struct urb *urb) 


	if (urb->status)

		dev_dbg(ir->dev, "Error: out urb status = %d\n", urb->status);



	/* if we sent an nop packet, do not expect a response */

	if (urb->status == 0 && ir->packet->header.cmd == CMD_NOP)

		complete(&ir->completion);

}



static int iguanair_send(struct iguanair *ir, unsigned size)
@@ -219,10 +224,17 @@ static int iguanair_get_features(struct iguanair *ir) 
{

	int rc;



	/*

	 * On cold boot, the iguanair initializes on the first packet

	 * received but does not process that packet. Send an empty

	 * packet.

	 */

	ir->packet->header.start = 0;

	ir->packet->header.direction = DIR_OUT;

	ir->packet->header.cmd = CMD_GET_VERSION;

	ir->packet->header.cmd = CMD_NOP;

	iguanair_send(ir, sizeof(ir->packet->header));



	ir->packet->header.cmd = CMD_GET_VERSION;

	rc = iguanair_send(ir, sizeof(ir->packet->header));

	if (rc) {

		dev_info(ir->dev, "failed to get version\n");
@@ -255,19 +267,14 @@ static int iguanair_get_features(struct iguanair *ir) 
	ir->packet->header.cmd = CMD_GET_FEATURES;



	rc = iguanair_send(ir, sizeof(ir->packet->header));

	if (rc) {

	if (rc)

		dev_info(ir->dev, "failed to get features\n");

		goto out;

	}



out:

	return rc;

}



static int iguanair_receiver(struct iguanair *ir, bool enable)

{

	int rc;



	ir->packet->header.start = 0;

	ir->packet->header.direction = DIR_OUT;

	ir->packet->header.cmd = enable ? CMD_RECEIVER_ON : CMD_RECEIVER_OFF;
@@ -275,9 +282,7 @@ static int iguanair_receiver(struct iguanair *ir, bool enable) 
	if (enable)

		ir_raw_event_reset(ir->rc);



	rc = iguanair_send(ir, sizeof(ir->packet->header));



	return rc;

	return iguanair_send(ir, sizeof(ir->packet->header));

}



/*