module: sink: source: Prevent division by zero issue

This patch prevents division by zero, when
source_get_frame_bytes() routine returns 0.

This change fixes issue thesofproject#8414.
The problem happens due to race condition during pipeline pause operation.
The exact failure mechanism require additional debug, but checking
frame_bytes value before division prevents exceptions.

Signed-off-by: Jaroslaw Stelter <Jaroslaw.Stelter@intel.com>

src/module/audio/source_api.c

@@ -53,6 +53,10 @@ size_t source_get_frame_bytes(struct sof_source *source)
 
 size_t source_get_data_frames_available(struct sof_source *source)
 {
- return source_get_data_available(source) /
- source_get_frame_bytes(source);
+ uint32_t frame_bytes = source_get_frame_bytes(source);
+
+ if (frame_bytes > 0)
+ return source_get_data_available(source) / frame_bytes;
+ else
+ return 0;
 }