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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-02-06 09:25:56 -0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-02-06 09:25:56 -0300 |
commit | ab809efaeba0cca20cfcda23852b0ee958f6ea69 (patch) | |
tree | 36b168deb9908cba8605bb8fa026bdacc26560db /drivers/gpu/drm/i915/gem/i915_gem_context.c | |
parent | 17f248aa8664ff5b3643491136283e73b5c18166 (diff) | |
parent | d2d11f342b179f1894a901f143ec7c008caba43e (diff) | |
download | linux-stable-ab809efaeba0cca20cfcda23852b0ee958f6ea69.tar.gz linux-stable-ab809efaeba0cca20cfcda23852b0ee958f6ea69.tar.bz2 linux-stable-ab809efaeba0cca20cfcda23852b0ee958f6ea69.zip |
Merge remote-tracking branch 'torvalds/master' into perf/core
To sync with libbpf, etc.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_context.c')
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_context.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 6250de9b9196..e4b78ab4773b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -1861,11 +1861,19 @@ static int get_ppgtt(struct drm_i915_file_private *file_priv, vm = ctx->vm; GEM_BUG_ON(!vm); + /* + * Get a reference for the allocated handle. Once the handle is + * visible in the vm_xa table, userspace could try to close it + * from under our feet, so we need to hold the extra reference + * first. + */ + i915_vm_get(vm); + err = xa_alloc(&file_priv->vm_xa, &id, vm, xa_limit_32b, GFP_KERNEL); - if (err) + if (err) { + i915_vm_put(vm); return err; - - i915_vm_get(vm); + } GEM_BUG_ON(id == 0); /* reserved for invalid/unassigned ppgtt */ args->value = id; |