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staging: comedi: adl_pci6208: don't deadlock while waiting to write ao data
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Wed, 18 Sep 2013 18:48:41 +0000 (11:48 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 25 Sep 2013 22:45:42 +0000 (15:45 -0700)
Remove a possible deadlock while waiting to write the analog output data.

The data transfer rate for every D/A data write in this driver is 2.2us.
Wait up to 10us for the board to be ready then and return -ETIME.

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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