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 <bcrocker@xxxxxxxxxx> --- drivers/gpu/drm/radeon/radeon_device.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index ffc10cadcf34..02538903830d 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -1395,7 +1395,10 @@ int radeon_device_init(struct radeon_device *rdev, if (rdev->flags & RADEON_IS_AGP) rdev->need_dma32 = true; if ((rdev->flags & RADEON_IS_PCI) && - (rdev->family <= CHIP_RS740)) + (rdev->family <= CHIP_RS740 || rdev->family == CHIP_CEDAR)) + rdev->need_dma32 = true; + if ((rdev->flags & RADEON_IS_PCIE) && + (rdev->family == CHIP_CEDAR)) rdev->need_dma32 = true; dma_bits = rdev->need_dma32 ? 32 : 40; -- 2.13.6 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
