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rptun: add ns_match callback to resolve rptun deadlock

Browse Source 
thread A: accept -> net_lock -> socket_rpmsg_accept
          -> rpmsg_register_callabck -> rptun_lock
thread B: ns_bind -> rpmsg_socket_ns_bind -> get_tx_payload_buffer
          -> rptun_wait_tx -> usrsock_rpmsg_ept_cb -> usrsockdev_write
          -> net_lock -> deadlock

fix:
add ns_match callback

Signed-off-by: ligd <liguiding1@xiaomi.com>
This commit is contained in:
ligd
2022-06-06 16:38:11 +08:00
committed by Xiang Xiao
parent 033cd4d7df
commit 8a3683fb9f
15 changed files with 213 additions and 112 deletions
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drivers/syslog/syslog_rpmsg_server.c
+11 -5
View File
@@ -63,6 +63,9 @@ struct syslog_rpmsg_server_s
static void syslog_rpmsg_write(FAR const char *buf1, size_t len1,
FAR const char *buf2, size_t len2);
static bool syslog_rpmsg_ns_match(FAR struct rpmsg_device *rdev,
FAR void *priv_, FAR const char *name,
uint32_t dest);
static void syslog_rpmsg_ns_bind(FAR struct rpmsg_device *rdev,
FAR void *priv_, FAR const char *name,
uint32_t dest);
@@ -167,6 +170,13 @@ static void syslog_rpmsg_write(FAR const char *buf1, size_t len1,
}
}
static bool syslog_rpmsg_ns_match(FAR struct rpmsg_device *rdev,
FAR void *priv_, FAR const char *name,
uint32_t dest)
{
return !strcmp(name, SYSLOG_RPMSG_EPT_NAME);
}
static void syslog_rpmsg_ns_bind(FAR struct rpmsg_device *rdev,
FAR void *priv_, FAR const char *name,
uint32_t dest)
@@ -174,11 +184,6 @@ static void syslog_rpmsg_ns_bind(FAR struct rpmsg_device *rdev,
FAR struct syslog_rpmsg_server_s *priv;
int ret;
if (strcmp(name, SYSLOG_RPMSG_EPT_NAME))
{
return;
}
priv = kmm_zalloc(sizeof(struct syslog_rpmsg_server_s));
if (!priv)
{
@@ -308,5 +313,6 @@ int syslog_rpmsg_server_init(void)
return rpmsg_register_callback(NULL,
NULL,
NULL,
syslog_rpmsg_ns_match,
syslog_rpmsg_ns_bind);
}