We need to disable stall on memory access after a fault, otherwise the
device using the iommu will be perma-wedged with no access to memory.
This was causing drm/msm to be unable to recover the gpu after an iommu
fault.
Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
---
drivers/iommu/msm_iommu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index b09692b..f6f596f 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -628,6 +628,7 @@ irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id)
pr_err("Interesting registers:\n");
print_ctx_regs(iommu->base, i);
SET_FSR(iommu->base, i, 0x4000000F);
+ SET_RESUME(iommu->base, i, 1);
}
}
__disable_clocks(iommu);
--
2.7.4
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