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drm/i915/gtt: Correct unshifted 'from' for gen8_ppgtt_alloc errors

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Since the underlying __gen8_ppgtt_clear takes the shifted address, we
must remember to provide it with the shifted original start address.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Tested-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190719131524.827-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-07-19 14:15:24 +01:00
parent a0301020c5
commit 6b5f3cb1aa
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -1103,7 +1103,7 @@ static int __gen8_ppgtt_alloc(struct i915_address_space * const vm,
static int gen8_ppgtt_alloc(struct i915_address_space *vm,
u64 start, u64 length)
{
u64 from = start;
u64 from;
int err;
GEM_BUG_ON(!IS_ALIGNED(start, BIT_ULL(GEN8_PTE_SHIFT)));
@ -1112,6 +1112,7 @@ static int gen8_ppgtt_alloc(struct i915_address_space *vm,
start >>= GEN8_PTE_SHIFT;
length >>= GEN8_PTE_SHIFT;
GEM_BUG_ON(length == 0);
from = start;
err = __gen8_ppgtt_alloc(vm, i915_vm_to_ppgtt(vm)->pd,
&start, start + length, vm->top);