ASoC: SOF: sof-audio: do not dereference swidget->spipe unconditionally on free

sof_widget_free_unlocked() dereferences swidget->spipe without checking
it for two things: swidget->spipe->complete for a scheduler widget, and
swidget->spipe->pipe_widget for the recursive free of the pipeline's
scheduler widget. Both can be reached with spipe or pipe_widget not
set, which oopses in the free path - where there is nothing left to
bail out to.

Check both before use and cache swidget->spipe in the local spipe
variable that is already there. A widget with no pipeline has nothing
to put or complete, and no scheduler widget to free, so skipping is the
correct behaviour.

No functional change for a widget that was successfully set up:
sof_widget_setup_unlocked() already rejects a dynamic pipeline widget
with no spipe or no spipe->pipe_widget with -EINVAL.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Link: https://patch.msgid.link/20261007084955.1256-13-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions