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| author | Navid Emamdoost <navid.emamdoost@gmail.com> | 2020-06-15 01:12:20 -0500 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2020-07-17 17:10:34 +0200 |
| commit | c5d5a32ead1e3a61a07a1e59eb52a53e4a6b2a7f (patch) | |
| tree | 1a42966580e46728ed331b64ae5e6e515eb3a4d8 /drivers/gpu/drm/etnaviv | |
| parent | 6a5ef3b224c63f500cc4a1b9a2cef8a9a3a328da (diff) | |
| download | linux-c5d5a32ead1e3a61a07a1e59eb52a53e4a6b2a7f.tar.bz2 | |
drm/etnaviv: fix ref count leak via pm_runtime_get_sync
in etnaviv_gpu_submit, etnaviv_gpu_recover_hang, etnaviv_gpu_debugfs,
and etnaviv_gpu_init the call to pm_runtime_get_sync increments the
counter even in case of failure, leading to incorrect ref count.
In case of failure, decrement the ref count before returning.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm/etnaviv')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index fb37787449bb..d5a4cd85a0f6 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -722,7 +722,7 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu) ret = pm_runtime_get_sync(gpu->dev); if (ret < 0) { dev_err(gpu->dev, "Failed to enable GPU power domain\n"); - return ret; + goto pm_put; } etnaviv_hw_identify(gpu); @@ -819,6 +819,7 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu) fail: pm_runtime_mark_last_busy(gpu->dev); +pm_put: pm_runtime_put_autosuspend(gpu->dev); return ret; @@ -859,7 +860,7 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) ret = pm_runtime_get_sync(gpu->dev); if (ret < 0) - return ret; + goto pm_put; dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW); dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH); @@ -1003,6 +1004,7 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) ret = 0; pm_runtime_mark_last_busy(gpu->dev); +pm_put: pm_runtime_put_autosuspend(gpu->dev); return ret; @@ -1016,7 +1018,7 @@ void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu) dev_err(gpu->dev, "recover hung GPU!\n"); if (pm_runtime_get_sync(gpu->dev) < 0) - return; + goto pm_put; mutex_lock(&gpu->lock); @@ -1035,6 +1037,7 @@ void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu) mutex_unlock(&gpu->lock); pm_runtime_mark_last_busy(gpu->dev); +pm_put: pm_runtime_put_autosuspend(gpu->dev); } @@ -1308,8 +1311,10 @@ struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) if (!submit->runtime_resumed) { ret = pm_runtime_get_sync(gpu->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_noidle(gpu->dev); return NULL; + } submit->runtime_resumed = true; } @@ -1326,6 +1331,7 @@ struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) ret = event_alloc(gpu, nr_events, event); if (ret) { DRM_ERROR("no free events\n"); + pm_runtime_put_noidle(gpu->dev); return NULL; } |