drm/i915/migrate: fix length calculation

[ Upstream commit 31d70749bfe110593fbe8bf45e7c7788c7d85035 ]

No need to insert PTEs for the PTE window itself, also foreach expects a
length not an end offset, which could be gigantic here with a second
engine.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206112539.3149779-3-matthew.auld@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index fb7fe3a2b6c6c835b5b93b904e87b3fd2a4c2d51..5b59a6effc207fb071a2f282dbafe1e8292c1d4c 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -133,7 +133,7 @@ static struct i915_address_space *migrate_vm(struct intel_gt *gt)
                        goto err_vm;
 
                /* Now allow the GPU to rewrite the PTE via its own ppGTT */
-               vm->vm.foreach(&vm->vm, base, base + sz, insert_pte, &d);
+               vm->vm.foreach(&vm->vm, base, d.offset - base, insert_pte, &d);
        }
 
        return &vm->vm;