greybus: define -EILSEQ to mean implementation error

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Reserve operation result code -EILSEQ to represent that the code
that implements an operation is broken.  This is used (initially)
for any attempt to set the result to -EBADR (which is reserved for
an operation in initial state), or for an attempt to set the result
of an operation that is *not* in initial state to -EINPROGRESS.

Note that we still use -EIO gb_operation_status_map() to represent a
gb_operation_result value that isn't recognized.

In gb_operation_result(), warn if operation->errno is -EBADR.  That
is another value that indicates the operation is not in a state
where it's valid to query an operation's result.

Update a bunch of comments above gb_operation_result_set() to
explain constraints on operation->errno.

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 07:53:08 -06:00 • committed by Greg Kroah-Hartman

parent ab3cf8dc7d

commit 2fb2d2a73f

1 changed files with 43 additions and 16 deletions

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drivers/staging/greybus/operation.c

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