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| author | Matthew Brost <matthew.brost@intel.com> | 2024-02-29 20:10:36 -0800 |
|---|---|---|
| committer | Matthew Brost <matthew.brost@intel.com> | 2024-03-01 09:36:01 -0800 |
| commit | 27b5a3f237fe66dbf2288c2b50973aee8a427e41 (patch) | |
| tree | 4d39902147c2b45c09f80587b4ba7e4b7357ed0d | |
| parent | 67b7950333925db42efaf0616caf4e77decddda1 (diff) | |
| download | linux-stable-27b5a3f237fe66dbf2288c2b50973aee8a427e41.tar.gz linux-stable-27b5a3f237fe66dbf2288c2b50973aee8a427e41.tar.bz2 linux-stable-27b5a3f237fe66dbf2288c2b50973aee8a427e41.zip | |
drm/xe: Fix ref counting leak on page fault
If a page fault occurs on VM not in fault a ref can be leaked. Fix this.
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240301041036.238471-1-matthew.brost@intel.com
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_pagefault.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c index c26e4fcca01e..73c535193a98 100644 --- a/drivers/gpu/drm/xe/xe_gt_pagefault.c +++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c @@ -146,10 +146,12 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf) /* ASID to VM */ mutex_lock(&xe->usm.lock); vm = xa_load(&xe->usm.asid_to_vm, pf->asid); - if (vm) + if (vm && xe_vm_in_fault_mode(vm)) xe_vm_get(vm); + else + vm = NULL; mutex_unlock(&xe->usm.lock); - if (!vm || !xe_vm_in_fault_mode(vm)) + if (!vm) return -EINVAL; retry_userptr: |