staging: comedi: addi_apci_3120: prevent deadlock in apci3120_ao_insn_write()

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The DA_READY bit (0x0001) in the status register needs to be set before the
analog outputs can be updated.

Use comedi_timeout() to prevent a deadlock condition while waiting for the
DA_READY bit to get set.

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 2014-10-20 11:34:18 -07:00 • committed by Greg Kroah-Hartman

parent 695f34cef3

commit ce987a8a8f

1 changed files with 17 additions and 4 deletions

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drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c

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