tree b04dfb8be51b0b1ff2fab56bab27cf89ad6243c5
parent 8616d1a2485fee1ae71d27d7c598acf1c9e32abe
author Tom Zanussi <zanussi@kernel.org> 1601051769 -0500
committer Tom Zanussi <zanussi@kernel.org> 1601489039 -0500

tracing: Fix parse_synth_field() error handling

synth_field_size() returns either a positive size or an error (zero or
a negative value). However, the existing code assumes the only error
value is 0. It doesn't handle negative error codes, as it assigns
directly to field->size (a size_t; unsigned), thereby interpreting the
error code as a valid size instead.

Do the test before assignment to field->size.

[ axelrasmussen@google.com: changelog addition, first paragraph above ]

Signed-off-by: Tom Zanussi <zanussi@kernel.org>