[Qemu-devel] [PATCH v2 1/2] spapr_iommu: drop erroneous check in h_put_tce_indirect()

[Greg Kurz]

The tce_list variable is not a TCE but the address to a TCE: we shouldn't
clear permission bits as we do now. And this is dead code anyway since we
check tce_list is 4K aligned a few lines above.

This patch doesn't fix any bug, it is only code cleanup.

Suggested-by: Alexey Kardashevskiy <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
---
 hw/ppc/spapr_iommu.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index 8cd9dba9ac4d..ddd0ea5cd4dd 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -267,9 +267,7 @@ static target_ulong h_put_tce_indirect(PowerPCCPU *cpu,
     ioba &= page_mask;
 
     for (i = 0; i < npages; ++i, ioba += page_size) {
-        target_ulong off = (tce_list & ~SPAPR_TCE_RW) +
-                                i * sizeof(target_ulong);
-        tce = ldq_be_phys(cs->as, off);
+        tce = ldq_be_phys(cs->as, tce_list + i * sizeof(target_ulong));
 
         ret = put_tce_emu(tcet, ioba, tce);
         if (ret) {