[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: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index b8b3e37..a4ab2e6 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -58,6 +58,7 @@
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 @@
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 @@
{
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 @@
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 @@
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));
}
/*