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drm/amdgpu: Fix sigsev when accessing MMIO on hot unplug.

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Protect with drm_dev_enter/exit

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2022-02-28 19:03:36 -05:00 committed by Alex Deucher
parent 7d4108e4ce
commit 57230f0ce6
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
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@ -23,6 +23,7 @@
*/
#include <drm/drm_auth.h>
#include <drm/drm_drv.h>
#include "amdgpu.h"
#include "amdgpu_sched.h"
#include "amdgpu_ras.h"
@ -339,7 +340,7 @@ static void amdgpu_ctx_fini(struct kref *ref)
{
struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
struct amdgpu_device *adev = ctx->adev;
unsigned i, j;
unsigned i, j, idx;
if (!adev)
return;
@ -350,7 +351,12 @@ static void amdgpu_ctx_fini(struct kref *ref)
ctx->entities[i][j] = NULL;
}
}
amdgpu_ctx_set_stable_pstate(ctx, AMDGPU_CTX_STABLE_PSTATE_NONE);
if (drm_dev_enter(&adev->ddev, &idx)) {
amdgpu_ctx_set_stable_pstate(ctx, AMDGPU_CTX_STABLE_PSTATE_NONE);
drm_dev_exit(idx);
}
kfree(ctx);
}