On Thu, Feb 22, 2018 at 5:52 PM, Ben Crocker <bcroc...@redhat.com> wrote:
> In radeon_device_init, set the need_dma32 flag for Cedar chips
> (e.g. FirePro 2270).  This fixes, or at least works around, a bug
> on PowerPC exposed by last year's commits
>
> 8e3f1b1d8255105f31556aacf8aeb6071b00d469 (Russell Currey)
>
> and
>
> 253fd51e2f533552ae35a0c661705da6c4842c1b (Alistair Popple)
>
> which enabled the 64-bit DMA iommu bypass.
>
> This caused the device to freeze, in some cases unrecoverably, and is
> the subject of several bug reports internal to Red Hat.
>
> Signed-off-by: Ben Crocker <bcroc...@redhat.com>

Applied. thanks!

Alex

> ---
>  drivers/gpu/drm/radeon/radeon_device.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_device.c 
> b/drivers/gpu/drm/radeon/radeon_device.c
> index ffc10cadcf34..32b577c776b9 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -1397,6 +1397,10 @@ int radeon_device_init(struct radeon_device *rdev,
>         if ((rdev->flags & RADEON_IS_PCI) &&
>             (rdev->family <= CHIP_RS740))
>                 rdev->need_dma32 = true;
> +#ifdef CONFIG_PPC64
> +       if (rdev->family == CHIP_CEDAR)
> +               rdev->need_dma32 = true;
> +#endif
>
>         dma_bits = rdev->need_dma32 ? 32 : 40;
>         r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
> --
> 2.13.6
>
> _______________________________________________
> dri-devel mailing list
> dri-de...@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

Reply via email to