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drm/amdkfd: validate pdd where it acquired first 

Currently pdd is validate after dereferencing it, which is
not correct, Thus validate pdd before its first use.

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Maninder Singh 2015-07-09 14:41:53 +05:30 committed by Oded Gabbay
parent d770e558e2
commit a0f67441b0
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/amd/amdkfd/kfd_process.c
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@ -420,6 +420,12 @@ void kfd_unbind_process_from_device(struct kfd_dev *dev, unsigned int pasid)
pqm_uninit(&p->pqm);
pdd = kfd_get_process_device_data(dev, p);
if (!pdd) {
mutex_unlock(&p->mutex);
return;
}
if (pdd->reset_wavefronts) {
dbgdev_wave_reset_wavefronts(pdd->dev, p);
pdd->reset_wavefronts = false;
@ -431,8 +437,7 @@ void kfd_unbind_process_from_device(struct kfd_dev *dev, unsigned int pasid)
* We don't call amd_iommu_unbind_pasid() here
* because the IOMMU called us.
*/
if (pdd)
pdd->bound = false;
pdd->bound = false;
mutex_unlock(&p->mutex);
}