| Message ID | 20181102121313.23271-1-robert.foss@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drm/msm: Move fence put to where failure occurs | expand |
Quoting Robert Foss (2018-11-02 12:13:13) > If dma_fence_wait fails to wait for a supplied in-fence in > msm_ioctl_gem_submit, make sure we release that in-fence. > > Also remove this dma_fence_put() from the 'out' label. > > Signed-off-by: Robert Foss <robert.foss@collabora.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Rob, this probably merits a cc:stable tag -- if the wait was interrupted by a signal, the fence would be leaked. -Chris
+stable On 2018-11-02 13:13, Robert Foss wrote: > If dma_fence_wait fails to wait for a supplied in-fence in > msm_ioctl_gem_submit, make sure we release that in-fence. > > Also remove this dma_fence_put() from the 'out' label. > > Signed-off-by: Robert Foss <robert.foss@collabora.com> > --- > Changes since v1: > - Chris Wilson: Make sure that dma_fence_put() is always executed > > > drivers/gpu/drm/msm/msm_gem_submit.c | 15 ++++++++------- > 1 file changed, 8 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c > index a90aedd6883a..d5e6665a4c8f 100644 > --- a/drivers/gpu/drm/msm/msm_gem_submit.c > +++ b/drivers/gpu/drm/msm/msm_gem_submit.c > @@ -411,7 +411,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, > struct msm_file_private *ctx = file->driver_priv; > struct msm_gem_submit *submit; > struct msm_gpu *gpu = priv->gpu; > - struct dma_fence *in_fence = NULL; > struct sync_file *sync_file = NULL; > struct msm_gpu_submitqueue *queue; > struct msm_ringbuffer *ring; > @@ -444,6 +443,8 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, > ring = gpu->rb[queue->prio]; > > if (args->flags & MSM_SUBMIT_FENCE_FD_IN) { > + struct dma_fence *in_fence; > + > in_fence = sync_file_get_fence(args->fence_fd); > > if (!in_fence) > @@ -453,11 +454,13 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, > * Wait if the fence is from a foreign context, or if the fence > * array contains any fence from a foreign context. > */ > - if (!dma_fence_match_context(in_fence, ring->fctx->context)) { > + ret = 0; > + if (!dma_fence_match_context(in_fence, ring->fctx->context)) > ret = dma_fence_wait(in_fence, true); > - if (ret) > - return ret; > - } > + > + dma_fence_put(in_fence); > + if (ret) > + return ret; > } > > ret = mutex_lock_interruptible(&dev->struct_mutex); > @@ -583,8 +586,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, > } > > out: > - if (in_fence) > - dma_fence_put(in_fence); > submit_cleanup(submit); > if (ret) > msm_gem_submit_free(submit); >
Hey Chris, On 2018-11-02 13:16, Chris Wilson wrote: > Quoting Robert Foss (2018-11-02 12:13:13) >> If dma_fence_wait fails to wait for a supplied in-fence in >> msm_ioctl_gem_submit, make sure we release that in-fence. >> >> Also remove this dma_fence_put() from the 'out' label. >> >> Signed-off-by: Robert Foss <robert.foss@collabora.com> > > Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Danke! > > Rob, this probably merits a cc:stable tag -- if the wait was interrupted > by a signal, the fence would be leaked. Ack, CC-ed the v2 submission. Rob.
On Fri, Nov 02, 2018 at 01:29:25PM +0100, Robert Foss wrote:
> +stable
<formletter>
This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.
</formletter>
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index a90aedd6883a..d5e6665a4c8f 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -411,7 +411,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, struct msm_file_private *ctx = file->driver_priv; struct msm_gem_submit *submit; struct msm_gpu *gpu = priv->gpu; - struct dma_fence *in_fence = NULL; struct sync_file *sync_file = NULL; struct msm_gpu_submitqueue *queue; struct msm_ringbuffer *ring; @@ -444,6 +443,8 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, ring = gpu->rb[queue->prio]; if (args->flags & MSM_SUBMIT_FENCE_FD_IN) { + struct dma_fence *in_fence; + in_fence = sync_file_get_fence(args->fence_fd); if (!in_fence) @@ -453,11 +454,13 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, * Wait if the fence is from a foreign context, or if the fence * array contains any fence from a foreign context. */ - if (!dma_fence_match_context(in_fence, ring->fctx->context)) { + ret = 0; + if (!dma_fence_match_context(in_fence, ring->fctx->context)) ret = dma_fence_wait(in_fence, true); - if (ret) - return ret; - } + + dma_fence_put(in_fence); + if (ret) + return ret; } ret = mutex_lock_interruptible(&dev->struct_mutex); @@ -583,8 +586,6 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, } out: - if (in_fence) - dma_fence_put(in_fence); submit_cleanup(submit); if (ret) msm_gem_submit_free(submit);
If dma_fence_wait fails to wait for a supplied in-fence in msm_ioctl_gem_submit, make sure we release that in-fence. Also remove this dma_fence_put() from the 'out' label. Signed-off-by: Robert Foss <robert.foss@collabora.com> --- Changes since v1: - Chris Wilson: Make sure that dma_fence_put() is always executed drivers/gpu/drm/msm/msm_gem_submit.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)