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Commit 0fa035e5 authored by Hari Kanigeri's avatar Hari Kanigeri Committed by Tony Lindgren
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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: default avatarHari Kanigeri <h-kanigeri2@ti.com>
Acked-by: default avatarHiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 3c729087

arch/arm/plat-omap/iommu.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

		}

	}