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omap: iommu-load cam register before flushing the entry 

The flush_iotlb_page is not loading the cam register before flushing
the cam entry. This causes wrong entry to be flushed out from the TLB, and
if the entry happens to be a locked TLB entry it would lead to MMU faults.

The fix is to load the cam register with the address to be flushed before
flushing the TLB entry.

Signed-off-by: Hari Kanigeri <h-kanigeri2@ti.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
hifive-unleashed-5.1
Hari Kanigeri 2010-08-20 13:50:18 +00:00 committed by Tony Lindgren
parent 3c729087d4
commit 0fa035e523
1 changed files with 1 additions and 0 deletions
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arch/arm/plat-omap/iommu.c
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@ -320,6 +320,7 @@ void flush_iotlb_page(struct iommu *obj, u32 da)
if ((start <= da) && (da < start + bytes)) {
dev_dbg(obj->dev, "%s: %08x<=%08x(%x)\n",
__func__, start, da, bytes);
iotlb_load_cr(obj, &cr);
iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
}
}