diff options
| author | Mitchel Humpherys <mitchelh@codeaurora.org> | 2015-10-21 13:59:50 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:14:29 -0700 |
| commit | 5997478ea4a664a16a5816d9a3cdff3661659906 (patch) | |
| tree | b5bf1dc10fd66a6e1b1877069d19156f3ce5897f | |
| parent | b47628bf9f6edd902e06be4ad669795f350dfe46 (diff) | |
iommu/arm-smmu: Make fault triggering more reliable
We're currently disabling clocks/power immediately after writing to
FSRRESTORE, but if the fault is not handled before we disable the
clocks/power then the fault could be lost. Add a 1-second sleep after
writing to FSRRESTORE to give the interrupt time to fire before turning
clocks/power back off.
Change-Id: Ieeba49686da5da92e43f03c3c593166592184433
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 2337ad9900e1..09761b765b2b 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1355,6 +1355,8 @@ static void arm_smmu_trigger_fault(struct iommu_domain *domain, dev_err(smmu->dev, "Writing 0x%lx to FSRRESTORE on cb %d\n", flags, cfg->cbndx); writel_relaxed(flags, cb_base + ARM_SMMU_CB_FSRRESTORE); + /* give the interrupt time to fire... */ + msleep(1000); arm_smmu_disable_clocks(smmu); } |