Staging: comedi: amplc_dio200: Protect counter subdevice with spinlock

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The internal state of an 82C54 counter timer chip will get messed up if
several threads read, write, configure, or check the status of the chip
simultaneously.  Protect the register access sequences with a spin lock.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Ian Abbott 2010-05-19 16:59:40 +01:00 • committed by Greg Kroah-Hartman

parent d4da77a73c

commit ee4063fa6b

1 changed files with 25 additions and 10 deletions

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drivers/staging/comedi/drivers/amplc_dio200.c

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