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| author | Hari Kanigeri <h-kanigeri2@ti.com> | 2010-08-20 13:50:18 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-10-05 10:22:13 -0700 |
| commit | 0fa035e52373386381fcdfbd506e32eac0c662f0 (patch) | |
| tree | 54096bf2eaa7f9d9ffa55c05a63711ee7f063900 /arch/arm/plat-omap/iommu.c | |
| parent | 3c729087d4312a4a1fa1a8b674fd9c8050cfc3db (diff) | |
| download | lwn-0fa035e52373386381fcdfbd506e32eac0c662f0.tar.gz lwn-0fa035e52373386381fcdfbd506e32eac0c662f0.zip | |
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>
Diffstat (limited to 'arch/arm/plat-omap/iommu.c')
| -rw-r--r-- | arch/arm/plat-omap/iommu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c index a202a2ce6e3d..6cd151b31bc5 100644 --- a/arch/arm/plat-omap/iommu.c +++ b/arch/arm/plat-omap/iommu.c @@ -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); } } |