summaryrefslogtreecommitdiff
path: root/drivers/iommu
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/arm-smmu-v3.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 99b83fda11e4..4d5a694f02c2 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2649,13 +2649,9 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
/* Clear CR0 and sync (disables SMMU and queue processing) */
reg = readl_relaxed(smmu->base + ARM_SMMU_CR0);
if (reg & CR0_SMMUEN) {
- if (is_kdump_kernel()) {
- arm_smmu_update_gbpa(smmu, GBPA_ABORT, 0);
- arm_smmu_device_disable(smmu);
- return -EBUSY;
- }
-
dev_warn(smmu->dev, "SMMU currently enabled! Resetting...\n");
+ WARN_ON(is_kdump_kernel() && !disable_bypass);
+ arm_smmu_update_gbpa(smmu, GBPA_ABORT, 0);
}
ret = arm_smmu_device_disable(smmu);
@@ -2758,6 +2754,8 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
return ret;
}
+ if (is_kdump_kernel())
+ enables &= ~(CR0_EVTQEN | CR0_PRIQEN);
/* Enable the SMMU interface, or ensure bypass */
if (!bypass || disable_bypass) {