From: Stefan Wahren wahrenst@gmx.net
[ Upstream commit 86bc8821700665ad3962f3ef0d93667f59cf7031 ]
Creating the keep-alive thread in vchiq_platform_init_state have the following advantages: - abort driver probe if kthread_create fails (more consistent behavior) - make resource release process easier
Since vchiq_keepalive_thread_func is defined below vchiq_platform_init_state, the latter must be moved.
Signed-off-by: Stefan Wahren wahrenst@gmx.net Link: https://lore.kernel.org/r/20250309125014.37166-5-wahrenst@gmx.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../interface/vchiq_arm/vchiq_arm.c | 69 +++++++++---------- 1 file changed, 34 insertions(+), 35 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 0c7ea2d0ee85e..64f9536f12329 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c @@ -280,29 +280,6 @@ static int vchiq_platform_init(struct platform_device *pdev, struct vchiq_state return 0; }
-int -vchiq_platform_init_state(struct vchiq_state *state) -{ - struct vchiq_arm_state *platform_state; - - platform_state = devm_kzalloc(state->dev, sizeof(*platform_state), GFP_KERNEL); - if (!platform_state) - return -ENOMEM; - - rwlock_init(&platform_state->susp_res_lock); - - init_completion(&platform_state->ka_evt); - atomic_set(&platform_state->ka_use_count, 0); - atomic_set(&platform_state->ka_use_ack_count, 0); - atomic_set(&platform_state->ka_release_count, 0); - - platform_state->state = state; - - state->platform_state = (struct opaque_platform_state *)platform_state; - - return 0; -} - static struct vchiq_arm_state *vchiq_platform_get_arm_state(struct vchiq_state *state) { return (struct vchiq_arm_state *)state->platform_state; @@ -1011,6 +988,39 @@ vchiq_keepalive_thread_func(void *v) return 0; }
+int +vchiq_platform_init_state(struct vchiq_state *state) +{ + struct vchiq_arm_state *platform_state; + char threadname[16]; + + platform_state = devm_kzalloc(state->dev, sizeof(*platform_state), GFP_KERNEL); + if (!platform_state) + return -ENOMEM; + + snprintf(threadname, sizeof(threadname), "vchiq-keep/%d", + state->id); + platform_state->ka_thread = kthread_create(&vchiq_keepalive_thread_func, + (void *)state, threadname); + if (IS_ERR(platform_state->ka_thread)) { + dev_err(state->dev, "couldn't create thread %s\n", threadname); + return PTR_ERR(platform_state->ka_thread); + } + + rwlock_init(&platform_state->susp_res_lock); + + init_completion(&platform_state->ka_evt); + atomic_set(&platform_state->ka_use_count, 0); + atomic_set(&platform_state->ka_use_ack_count, 0); + atomic_set(&platform_state->ka_release_count, 0); + + platform_state->state = state; + + state->platform_state = (struct opaque_platform_state *)platform_state; + + return 0; +} + int vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, enum USE_TYPE_E use_type) @@ -1331,7 +1341,6 @@ void vchiq_platform_conn_state_changed(struct vchiq_state *state, enum vchiq_connstate newstate) { struct vchiq_arm_state *arm_state = vchiq_platform_get_arm_state(state); - char threadname[16];
dev_dbg(state->dev, "suspend: %d: %s->%s\n", state->id, get_conn_state_name(oldstate), get_conn_state_name(newstate)); @@ -1346,17 +1355,7 @@ void vchiq_platform_conn_state_changed(struct vchiq_state *state,
arm_state->first_connect = 1; write_unlock_bh(&arm_state->susp_res_lock); - snprintf(threadname, sizeof(threadname), "vchiq-keep/%d", - state->id); - arm_state->ka_thread = kthread_create(&vchiq_keepalive_thread_func, - (void *)state, - threadname); - if (IS_ERR(arm_state->ka_thread)) { - dev_err(state->dev, "suspend: Couldn't create thread %s\n", - threadname); - } else { - wake_up_process(arm_state->ka_thread); - } + wake_up_process(arm_state->ka_thread); }
static const struct of_device_id vchiq_of_match[] = {