staging: comedi: das1800: document the spinlock

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The comedi_device spinlock is used to protect the indirect addressing
selected by the DAS1800_SELECT register. It also prevents races between
the interrupt handler and the analog input (*poll).

Update the comments to make this clear.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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H Hartley Sweeten 2016-04-08 12:41:53 -07:00 • committed by Greg Kroah-Hartman

parent fb90ec01bc

commit 983330210f

1 changed files with 14 additions and 4 deletions

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drivers/staging/comedi/drivers/das1800.c

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