V4L/DVB (9595): cx18: Improve handling of outgoing mailboxes detected to be busy

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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>

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This commit is contained in:

Andy Walls 2008-11-07 23:57:46 -03:00 • committed by Mauro Carvalho Chehab

parent d670b6ff4e

commit ac50441720

2 changed files with 64 additions and 69 deletions

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3

drivers/media/video/cx18/cx18-irq.c

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130

drivers/media/video/cx18/cx18-mailbox.c

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