staging: comedi: ni_nio_common: don't write non-existing caldac's

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ni_write_caldac() checks the boardinfo 'caldac' array to determine what
caldac is used for a given 'addr'. It then calculates the 'bitstring' and
number of 'bits' used to write a value to that caldac address.

After checking the caldac array, if the number of bits is 0 there is no
caldac associated with the address. If this happens we shouldn't try
writing to the non-existing caldac.

Reported-by: coverity (CID 1192116)
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 2015-04-20 11:49:05 -07:00 • committed by Greg Kroah-Hartman

parent b3ab6fbfd8

commit accb298fb2

1 changed files with 4 additions and 0 deletions

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drivers/staging/comedi/drivers/ni_mio_common.c

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