[PATCH 20/27] drm/etnaviv: refcount the submit object

[Lucas Stach]

The submit object lifetime will get extended to the actual GPU
execution. As multiple users will depend on this, add a kref to
properly control destuction of the object.

Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_gem.h        |  3 +++
 drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 12 ++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.h 
b/drivers/gpu/drm/etnaviv/etnaviv_gem.h
index 6b78d059ed2d..4238f8d8541d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.h
@@ -101,6 +101,7 @@ struct etnaviv_gem_submit_bo {
  * lasts for the duration of the submit-ioctl.
  */
 struct etnaviv_gem_submit {
+       struct kref refcount;
        struct etnaviv_gpu *gpu;
        struct dma_fence *out_fence, *in_fence;
        u32 flags;
@@ -109,6 +110,8 @@ struct etnaviv_gem_submit {
        /* No new members here, the previous one is variable-length! */
 };
 
+void etnaviv_submit_put(struct etnaviv_gem_submit * submit);
+
 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
        struct timespec *timeout);
 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c 
b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index 3090a46979af..9b4436c380ea 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -43,6 +43,7 @@ static struct etnaviv_gem_submit *submit_create(struct 
drm_device *dev,
                return NULL;
 
        submit->gpu = gpu;
+       kref_init(&submit->refcount);
 
        return submit;
 }
@@ -341,8 +342,10 @@ static int submit_perfmon_validate(struct 
etnaviv_gem_submit *submit,
        return 0;
 }
 
-static void submit_cleanup(struct etnaviv_gem_submit *submit)
+static void submit_cleanup(struct kref *kref)
 {
+       struct etnaviv_gem_submit *submit =
+                       container_of(kref, struct etnaviv_gem_submit, refcount);
        unsigned i;
 
        for (i = 0; i < submit->nr_bos; i++) {
@@ -367,6 +370,11 @@ static void submit_cleanup(struct etnaviv_gem_submit 
*submit)
        kfree(submit);
 }
 
+void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
+{
+       kref_put(&submit->refcount, submit_cleanup);
+}
+
 int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
                struct drm_file *file)
 {
@@ -544,7 +552,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void 
*data,
        args->fence = submit->out_fence->seqno;
 
 err_submit_objects:
-       submit_cleanup(submit);
+       etnaviv_submit_put(submit);
 
 err_submit_ww_acquire:
        ww_acquire_fini(&ticket);
-- 
2.11.0

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