On 01/29/15 12:51, Raimonds Cicans wrote: > On 29.01.2015 09:33, Hans Verkuil wrote: >> On 01/11/2015 10:33 AM, Raimonds Cicans wrote: >>> I contacted you because I am hit by regression caused by your commit: >>> 453afdd "[media] cx23885: convert to vb2" >>> >>> >>> My system: >>> AMD Athlon(tm) II X2 240e Processor on Asus M5A97 LE R2.0 motherboard >>> TBS6981 card (Dual DVB-S/S2 PCIe receiver, cx23885 in kernel driver) >>> >>> After upgrade from kernel 3.13.10 (do not have commit) to 3.17.7 >>> (have commit) I started receiving following IOMMU related messages: >>> >>> 1) >>> AMD-Vi: Event logged [IO_PAGE_FAULT device=0a:00.0 domain=0x001d >>> address=0x000000000637c000 flags=0x0000] >>> >>> where device=0a:00.0 is TBS6981 card >> As far as I can tell this has nothing to do with the cx23885 driver but is >> a bug in the amd iommu/BIOS. See e.g.: >> >> https://bbs.archlinux.org/viewtopic.php?pid=1309055 >> >> I managed to reproduce the Intel equivalent if I enable CONFIG_IOMMU_SUPPORT. >> >> Most likely due to broken BIOS/ACPI/whatever information that's read by the >> kernel. I would recommend disabling this kernel option. >> > Maybe... > > But on other hand this did not happen on old kernel with old driver. > And when I did bisection on old kernel + media tree I started to > receive this message only on new driver. Was CONFIG_IOMMU_SUPPORT enabled in the old kernel? Regards, Hans > And I can not disable this feature because then USB and LAN > stop working. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
