K 10
svn:author
V 4
neel
K 8
svn:date
V 27
2014-10-26T03:03:41.531127Z
K 7
svn:log
V 390
Don't pass the 'error' return from an I/O port handler directly to vm_run().

Most I/O port handlers return -1 to signal an error. If this value is returned
without modification to vm_run() then it leads to incorrect behavior because
'-1' is interpreted as ERESTART at the system call level.

Fix this by always returning EIO to signal an error from an I/O port handler.

MFC after:	1 week

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