V4L/DVB (9595): cx18: Improve handling of outgoing mailboxes detected to be busy
cx18: Improve handling of outgoing mailboxes detected to be busy. When
encountering a busy mailbox, sleep instead of polling, and wait for interrupt or
timeout. If the mailbox is still busy, force it free. When sending commands,
make sure we never create a situation where we mark the mailbox busy upon
sending, and ensure we always have a method to cleanly recover from a busy
mailbox.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/cx18/cx18-irq.c b/drivers/media/video/cx18/cx18-irq.c
index 37b9310..4912b3c 100644
--- a/drivers/media/video/cx18/cx18-irq.c
+++ b/drivers/media/video/cx18/cx18-irq.c
@@ -167,7 +167,8 @@
cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2);
if (sw1 || sw2 || hw2)
- CX18_DEBUG_HI_IRQ("SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2);
+ CX18_DEBUG_HI_IRQ("received interrupts "
+ "SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2);
/* To do: interrupt-based I2C handling
if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) {