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authorIan Abbott <abbotti@mev.co.uk>2010-05-19 16:59:40 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-06-04 13:38:53 -0700
commitee4063fa6bd801fa6ea045f23a2934db009b3dac (patch)
treef23288b2f1900fa34950381a2c63ab11f42e4391 /drivers/media
parentd4da77a73cb9cc9a1a349daa1a2723505b086e2d (diff)
Staging: comedi: amplc_dio200: Protect counter subdevice with spinlock
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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