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Subject[PATCH 4.18 199/235] staging: bcm2835-audio: Dont leak workqueue if open fails
Date
4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tuomas Tynkkynen <tuomas@tuxera.com>

[ Upstream commit 678c5b119307c40f9a17152512f9c949d0ec7292 ]

Currently, if bcm2835_audio_open() fails partway, the allocated
workqueue is leaked. Avoid that.

While at it, propagate the return value of
bcm2835_audio_open_connection() on failure instead of returning -1.

Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c | 16 +++++++-----
1 file changed, 10 insertions(+), 6 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
@@ -439,16 +439,16 @@ int bcm2835_audio_open(struct bcm2835_al
my_workqueue_init(alsa_stream);

ret = bcm2835_audio_open_connection(alsa_stream);
- if (ret) {
- ret = -1;
- goto exit;
- }
+ if (ret)
+ goto free_wq;
+
instance = alsa_stream->instance;
LOG_DBG(" instance (%p)\n", instance);

if (mutex_lock_interruptible(&instance->vchi_mutex)) {
LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", instance->num_connections);
- return -EINTR;
+ ret = -EINTR;
+ goto free_wq;
}
vchi_service_use(instance->vchi_handle[0]);

@@ -471,7 +471,11 @@ int bcm2835_audio_open(struct bcm2835_al
unlock:
vchi_service_release(instance->vchi_handle[0]);
mutex_unlock(&instance->vchi_mutex);
-exit:
+
+free_wq:
+ if (ret)
+ destroy_workqueue(alsa_stream->my_wq);
+
return ret;
}


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