With this we can drop the final kfree from the release function.
I also noticed that the unwind code is wrong, after drm_dev_init the
drm_device owns the v3d allocation, so the kfree(v3d) is a double-free.
Reorder the setup to fix this issue.
After a bit more prep in drivers and drm core v3d should be able to
switch over to devm_drm_dev_init, which should clean this up further.
Acked-by: Eric Anholt <e...@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
Cc: Eric Anholt <e...@anholt.net>
---
drivers/gpu/drm/v3d/v3d_drv.c | 38 ++++++++++++++++++-----------------
1 file changed, 20 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index eaa8e9682373..8d0c0daaac81 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -25,6 +25,7 @@
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
+#include <drm/drm_managed.h>
#include <uapi/drm/v3d_drm.h>
#include "v3d_drv.h"
@@ -257,13 +258,23 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
v3d->pdev = pdev;
drm = &v3d->drm;
+ ret = drm_dev_init(&v3d->drm, &v3d_drm_driver, dev);
+ if (ret) {
+ kfree(v3d);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, drm);
+ drm->dev_private = v3d;
+ drmm_add_final_kfree(drm, v3d);
+
ret = map_regs(v3d, &v3d->hub_regs, "hub");
if (ret)
- goto dev_free;
+ goto dev_destroy;
ret = map_regs(v3d, &v3d->core_regs[0], "core0");
if (ret)
- goto dev_free;
+ goto dev_destroy;
mmu_debug = V3D_READ(V3D_MMU_DEBUG_INFO);
dev->coherent_dma_mask =
@@ -281,21 +292,21 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
ret = PTR_ERR(v3d->reset);
if (ret == -EPROBE_DEFER)
- goto dev_free;
+ goto dev_destroy;
v3d->reset = NULL;
ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
if (ret) {
dev_err(dev,
"Failed to get reset control or bridge regs\n");
- goto dev_free;
+ goto dev_destroy;
}
}
if (v3d->ver < 41) {
ret = map_regs(v3d, &v3d->gca_regs, "gca");
if (ret)
- goto dev_free;
+ goto dev_destroy;
}
v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
@@ -303,23 +314,16 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
if (!v3d->mmu_scratch) {
dev_err(dev, "Failed to allocate MMU scratch page\n");
ret = -ENOMEM;
- goto dev_free;
+ goto dev_destroy;
}
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 50);
pm_runtime_enable(dev);
- ret = drm_dev_init(&v3d->drm, &v3d_drm_driver, dev);
- if (ret)
- goto dma_free;
-
- platform_set_drvdata(pdev, drm);
- drm->dev_private = v3d;
-
ret = v3d_gem_init(drm);
if (ret)
- goto dev_destroy;
+ goto dma_free;
ret = v3d_irq_init(v3d);
if (ret)
@@ -335,12 +339,10 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
v3d_irq_disable(v3d);
gem_destroy:
v3d_gem_destroy(drm);
-dev_destroy:
- drm_dev_put(drm);
dma_free:
dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
-dev_free:
- kfree(v3d);
+dev_destroy:
+ drm_dev_put(drm);
return ret;
}
--
2.24.1
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