Commit f8ac0fb5 authored Apr 05, 2017 by Patrick Daly

iommu: arm-smmu: Fix list iteration error



After using list_for_each_entry, the iterator variable is set to the
head of the list even if the list is empty. Check for this and
return NULL in this case.

Change-Id: Ibd931f2353dee705b6be857e53854f1299219016
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent e15b3bc7

drivers/iommu/arm-smmu.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -4124,10 +4124,10 @@ static struct qsmmuv500_tbu_device *qsmmuv500_find_tbu(
		list_for_each_entry(tbu, &data->tbus, list) {
		if (tbu->sid_start <= sid &&
		sid < tbu->sid_start + tbu->num_sids)
		break;
		}
		return tbu;
		}
		return NULL;
		}

		static void qsmmuv500_device_reset(struct arm_smmu_device *smmu)
		{