On Thu, 2011-05-19 at 16:08 +0200, Michel Dänzer wrote:
> From: Michel Dänzer <daen...@vmware.com>
>
> This was based on a description by Ben Herrenschmidt:
>
> > I've removed that SBA reset from the normal TLB invalidation path and
> > left it only once after turning AGP on.
>
> About six months ago, he said:
>
> > I did it a bit differently, but yeah, you get the idea. I'm doing a
> > patch series so don't bother pushing things too hard yet.
>
> But I haven't seen anything from him about this since then, and people are
> regularly hitting these lockups, so here we are...
>
> Signed-off-by: Michel Dänzer <daen...@vmware.com>
Oops. I do have a pile of patches, but I never got something "stable"
enough and got distracted by more important stuff. Dave, please merge
this for now.
Acked-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Thanks !
Cheers,
Ben.
> ---
> drivers/char/agp/uninorth-agp.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
> index 47c2218..55af723 100644
> --- a/drivers/char/agp/uninorth-agp.c
> +++ b/drivers/char/agp/uninorth-agp.c
> @@ -80,7 +80,7 @@ static void uninorth_tlbflush(struct agp_memory *mem)
> ctrl | UNI_N_CFG_GART_INVAL);
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, ctrl);
>
> - if (uninorth_rev <= 0x30) {
> + if (!mem && uninorth_rev <= 0x30) {
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
> ctrl | UNI_N_CFG_GART_2xRESET);
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
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