Re: [PATCH 1/1] staging: vc04_services: Use %p4cc format modifier to print FourCC codes

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On 10/25/23 2:58 PM, Sakari Ailus wrote:
On Wed, Oct 25, 2023 at 10:10:08AM +0300, Dan Carpenter wrote:
On Wed, Oct 25, 2023 at 02:07:17AM -0400, Umang Jain wrote:
Drop VCHIQ_FOURCC_AS_4CHARS macro in favour of %p4cc format
modifier to print FourCC codes in the logs.

vchiq_use_internal() and vchiq_release_internal() uses entity
character-array to store a transient string that contains
a FourCC code. Increase the length of entity array(to 64 bytes)
since %p4cc requires more bytes to hold the output characters.

Suggested-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
Signed-off-by: Umang Jain <umang.jain@xxxxxxxxxxxxxxxx>
---
  .../interface/vchiq_arm/vchiq_arm.c           | 20 +++++-----
  .../interface/vchiq_arm/vchiq_core.c          | 40 +++++++++----------
  .../interface/vchiq_arm/vchiq_core.h          |  6 ---
  .../interface/vchiq_arm/vchiq_dev.c           |  7 ++--
  4 files changed, 33 insertions(+), 40 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index fc6d33ec5e95..de6a24304a4d 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -1441,7 +1441,7 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
  {
  	struct vchiq_arm_state *arm_state = vchiq_platform_get_arm_state(state);
  	int ret = 0;
-	char entity[16];
+	char entity[64];
  	int *entity_uc;
  	int local_uc;
@@ -1454,8 +1454,8 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
  		sprintf(entity, "VCHIQ:   ");
  		entity_uc = &arm_state->peer_use_count;
  	} else if (service) {
-		sprintf(entity, "%c%c%c%c:%03d",
-			VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
+		sprintf(entity, "%p4cc:%03d",
Not related to your patch but these sprintfs() make me very
uncomfortable.

KTODO: change sprintf() to snprintf() in staging/vc04_services/
Umang: how about one patch on top of this? :-) There are just five
instances of it.

Ricardo, how about this? Do you want to take a swing at this ? :-)

And send a v2. ?





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