SRU for F/OEM-5.6/G: https://lists.ubuntu.com/archives/kernel- team/2020-September/113289.html
** Description changed: + [SRU Justification] + + [Impact] + + When booting with a certain platforms with boot disk attached to SATA + bus behind Intel VMD controller, disk probing may fail with following + error messages left in dmesg: + + [ 6.163286] ata1.00: qc timeout (cmd 0xec) + [ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) + + [Fix] + + Proposed kernel patch https://patchwork.kernel.org/patch/11758345/ + + [Test Case] + + Check dmesg/lsblk for disk probe. + + For pci MSI address, check lspci output: + + $ lspci -vvnn + .... + Capabilities: [80] MSI: Enable+ Count=1/1 maskable- 64bit- + Address: fee00000 Data: 0000 + + When it fails, the address is fee00000. And with a patched kernel: + + $ lspci -vvnn + .... + Capabilities: [80] MSI: Enable+ Count=1/1 maskable- 64bit- + Address: fee01000 Data: 0000 + + [Regression Potential] + Low. For previous NVMe based platforms, this patch brings no effective + change for NVMe devices because they will still stay in fast-interrupt + list. + + ========== Original Bug Description ========== + When booting with root filesystem on sata disks under Intel VMD mode, following errors printed in dmesg and no disk is found, nor booting into it: - [ 6.163286] ata1.00: qc timeout (cmd 0xec) - [ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) - [ 6.483649] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) - [ 16.659284] ata1.00: qc timeout (cmd 0xec) - [ 16.661717] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) - [ 16.663161] ata1: limiting SATA link speed to 1.5 Gbps - [ 16.983890] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) - [ 48.147294] ata1.00: qc timeout (cmd 0xec) - [ 48.149737] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) - [ 48.467889] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) + [ 6.163286] ata1.00: qc timeout (cmd 0xec) + [ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) + [ 6.483649] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) + [ 16.659284] ata1.00: qc timeout (cmd 0xec) + [ 16.661717] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) + [ 16.663161] ata1: limiting SATA link speed to 1.5 Gbps + [ 16.983890] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) + [ 48.147294] ata1.00: qc timeout (cmd 0xec) + [ 48.149737] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) + [ 48.467889] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) - $ lspci - ... - 10000:e0:17.0 SATA controller: Intel Corporation Device a0d3 (rev 20) + $ lspci + ... + 10000:e0:17.0 SATA controller: Intel Corporation Device a0d3 (rev 20) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894778 Title: Cannot probe sata disk on sata controller behind VMD: ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1894778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
