greybus: enforce max representable message size

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We represent the size of a message using a 16-bit field.  It's
possible for a host driver to advertise a maximum message size
that's bigger than that.  If that happens, reduce the host device's
maximum buffer size to the maximum we can represent the first time
a message is allocated.

This information is actually only used by the Greybus code, but
because we're modifying a value that's "owned" by the host driver,
issue a warning when this limit is being imposed

Ensure (at build time) that our own definition is sane as well.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

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Alex Elder 2014-12-01 07:53:07 -06:00 • committed by Greg Kroah-Hartman

parent 94b15d7613

commit ab3cf8dc7d

1 changed files with 9 additions and 0 deletions

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drivers/staging/greybus/operation.c

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