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Commit 7b67798f authored by Vivek Kumar's avatar Vivek Kumar Committed by Gerrit - the friendly Code Review server
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iommu: arm-smmu: Restore iommu context in case of hibernation 



During hibernation iommu-context registers are not retained,
so add a check and restore iommu registers if hibernation is
enabled.

Change-Id: Idc8f45b25aa6ff92602385c57ee1f2239a353418
Signed-off-by: default avatarVivek Kumar <vivekuma@codeaurora.org>
parent 4f3c8d4f

drivers/iommu/arm-smmu.c

+2 −1
Original line number Diff line number Diff line
@@ -4200,7 +4200,8 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu) 
	 * Reset stream mapping groups: Initial values mark all SMRn as

	 * invalid and all S2CRn as bypass unless overridden.

	 */

	if (!(smmu->options & ARM_SMMU_OPT_SKIP_INIT)) {

	if (!(smmu->options & ARM_SMMU_OPT_SKIP_INIT) ||

			IS_ENABLED(CONFIG_HIBERNATION)) {

		for (i = 0; i < smmu->num_mapping_groups; ++i)

			arm_smmu_write_sme(smmu, i);