diff options
| -rw-r--r-- | arch/ia64/sn/pci/tioca_provider.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c index 2234d61cdd4b..54a0dd447e76 100644 --- a/arch/ia64/sn/pci/tioca_provider.c +++ b/arch/ia64/sn/pci/tioca_provider.c @@ -171,15 +171,15 @@ tioca_gart_init(struct tioca_kernel *tioca_kern) * use agp op-combining * use GET semantics to fetch memory * participate in coherency domain - * prefetch TLB entries + * DISABLE GART PREFETCHING due to hw bug tracked in SGI PV930029 */ ca_base->ca_control1 |= CA_AGPDMA_OP_ENB_COMBDELAY; /* PV895469 ? */ ca_base->ca_control2 &= ~(CA_GART_MEM_PARAM); ca_base->ca_control2 |= (0x2ull << CA_GART_MEM_PARAM_SHFT); tioca_kern->ca_gart_iscoherent = 1; - ca_base->ca_control2 |= - (CA_GART_WR_PREFETCH_ENB | CA_GART_RD_PREFETCH_ENB); + ca_base->ca_control2 &= + ~(CA_GART_WR_PREFETCH_ENB | CA_GART_RD_PREFETCH_ENB); /* * Unmask GART fetch error interrupts. Clear residual errors first. |