https://bugzilla.kernel.org/show_bug.cgi?id=202055 --- Comment #23 from Dongli Zhang (dongli.zhang@xxxxxxxxxx) --- (In reply to Alex Williamson from comment #21) > Actually, msleep(100) may be a few orders of magnitude longer than we need, > I continue to see errors with udelay(10), but it seems to work perfectly > with udelay(100). Dongli, please test the above using udelay(100) rather > than msleep(100). Thanks Hi Alex, While waiting for the patch mentioned by Comment 22, I have tested the below by adding udelay(100): 3828 static int prefer_bus_reset(struct pci_dev *dev, int probe) 3829 { 3830 udelay(100); 3831 return pci_parent_bus_reset(dev, probe); 3832 } I got the below error again: QEMU: # ./x86_64-softmmu/qemu-system-x86_64 -hda /home/zhang/img/ubuntu/disk.img -smp 2 -m 2000M -enable-kvm -vnc :0 -device vfio-pci,host=0000:01:00.0 WARNING: Image format was not specified for '/home/zhang/img/ubuntu/disk.img' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. qemu-system-x86_64: vfio_err_notifier_handler(0000:01:00.0) Unrecoverable error detected. Please collect any data possible and then kill the guest KERNEL: [ 69.715224] pcieport 0000:00:1b.0: AER: Uncorrected (Non-Fatal) error received: 0000:00:1b.0 [ 69.715230] pcieport 0000:00:1b.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Receiver ID) [ 69.715234] pcieport 0000:00:1b.0: device [8086:a2e7] error status/mask=00200000/00010000 [ 69.715236] pcieport 0000:00:1b.0: [21] ACSViol (First) [ 70.742423] pcieport 0000:00:1b.0: AER: Device recovery successful [ 70.742430] pcieport 0000:00:1b.0: AER: Uncorrected (Non-Fatal) error received: 0000:00:1b.0 [ 70.742442] pcieport 0000:00:1b.0: can't find device of ID00d8 [ 70.742554] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x19@0x158 [ 70.742562] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x1e@0x180 [ 70.834427] pcieport 0000:00:1b.0: AER: Uncorrected (Non-Fatal) error received: 0000:00:1b.0 [ 70.834440] pcieport 0000:00:1b.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Receiver ID) [ 70.834448] pcieport 0000:00:1b.0: device [8086:a2e7] error status/mask=00200000/00010000 [ 70.834453] pcieport 0000:00:1b.0: [21] ACSViol (First) [ 71.822627] pcieport 0000:00:1b.0: AER: Device recovery successful [ 71.822634] pcieport 0000:00:1b.0: AER: Uncorrected (Non-Fatal) error received: 0000:00:1b.0 [ 71.822645] pcieport 0000:00:1b.0: can't find device of ID00d8 Dongli Zhang -- You are receiving this mail because: You are watching the assignee of the bug.
