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media: vfm: fixed vfm crash bug [1/1]

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PD#141785: fixed vframe provider debug
	merged from 7.1
        for o bug:153539
	old commit:5f5fcfa9c618 & 3bcf5865b002fa
	print info's buffer may freeed so dump old provider
	infos may crash.
	used  buffer array now.

Change-Id: I537f62fda4bd541513b929fa5a2e289b1ea66558
Signed-off-by: Zhi Zhou <zhi.zhou@amlogic.com>
This commit is contained in:
Zhi Zhou
2017-11-09 15:15:11 +08:00
parent f6a3271ab8
commit 420cb9b88e
1 changed files with 11 additions and 8 deletions
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19
drivers/amlogic/media/common/vfm/vframe_provider.c
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@@ -45,15 +45,18 @@ static DEFINE_MUTEX(provider_table_mutex);
#define VFPROVIER_DEBUG
#ifdef VFPROVIER_DEBUG
static DEFINE_SPINLOCK(provider_lock);
static const char *last_receiver;
static const char *last_provider;
void provider_update_caller(const char *receiver, const char *provider)
static char last_receiver[32];
static char last_provider[32];
void provider_update_caller(
const char *receiver,
const char *provider)
{
unsigned long flags;
spin_lock_irqsave(&provider_lock, flags);
last_receiver = receiver;
last_provider = provider;
if (receiver)
strncpy(last_receiver, receiver, 31);
if (provider)
strncpy(last_provider, provider, 31);
spin_unlock_irqrestore(&provider_lock, flags);
}
@@ -65,9 +68,9 @@ void provider_print_last_info(void)
spin_lock_irqsave(&provider_lock, flags);
pr_info("last receiver: %s\n",
last_receiver ? last_receiver : "null");
last_receiver[0] ? last_receiver : "null");
pr_info("last provider: %s\n",
last_provider ? last_provider : "null");
last_provider[0] ? last_provider : "null");
pr_info("register provider:\n");
for (i = 0; i < MAX_PROVIDER_NUM; i++) {
p = provider_table[i];