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[media] media-entity.c: get rid of var length arrays 

Fix those sparse warnings:
	drivers/media/media-entity.c:238:17: warning: Variable length array is used.
	drivers/media/media-entity.c:239:17: warning: Variable length array is used.

That allows sparse and other code check tools to verify if the
function is using more stack than allowed.

It also solves a bad Kernel pratice of using var length arrays
at the stack.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2015-10-01 18:07:53 -03:00
parent ca739eb086
commit ef69ee1bc2
2 changed files with 9 additions and 2 deletions
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4
drivers/media/media-entity.c
View File

@ -235,8 +235,8 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity,
media_entity_graph_walk_start(&graph, entity); media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) { while ((entity = media_entity_graph_walk_next(&graph))) {
DECLARE_BITMAP(active, entity->num_pads); DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS);
DECLARE_BITMAP(has_no_links, entity->num_pads); DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS);
unsigned int i; unsigned int i;
entity->stream_count++; entity->stream_count++;

7
include/media/media-entity.h
View File

@ -116,6 +116,13 @@ static inline u32 media_entity_subtype(struct media_entity *entity)
#define MEDIA_ENTITY_ENUM_MAX_DEPTH 16 #define MEDIA_ENTITY_ENUM_MAX_DEPTH 16
#define MEDIA_ENTITY_ENUM_MAX_ID 64 #define MEDIA_ENTITY_ENUM_MAX_ID 64
/*
* The number of pads can't be bigger than the number of entities,
* as the worse-case scenario is to have one entity linked up to
* MEDIA_ENTITY_ENUM_MAX_ID - 1 entities.
*/
#define MEDIA_ENTITY_MAX_PADS (MEDIA_ENTITY_ENUM_MAX_ID - 1)
struct media_entity_graph { struct media_entity_graph {
struct { struct {
struct media_entity *entity; struct media_entity *entity;