On Wed, 06 Oct 2021 12:06:55 +0100, Rui Salvaterra <rsalvaterra@xxxxxxxxx> wrote: > > Hi, Marc, > > On Wed, 6 Oct 2021 at 12:00, Marc Zyngier <maz@xxxxxxxxxx> wrote: > > > > Could you please give more context for this error? I assume that this > > is some ATA device probing, but this is unclear at best. A full dmesg > > definitely help. > > I'd love to have it, but I don't have a serial console to get it from. > I can take a photo, of course, but there's no stack dump. That wouldn't be very helpful, unfortunately. > > > 'lspci -vvnn' would also be useful to understand what the device wants > > in terms of PCI configuration. > > Sure thing, here it goes (complete dump): > > 00:0b.0 SATA controller [0106]: NVIDIA Corporation MCP79 AHCI > Controller [10de:0ab8] (rev b1) (prog-if 01 [AHCI 1.0]) > Subsystem: ZOTAC International (MCO) Ltd. MCP79 AHCI Controller [19da:a108] > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- > ParErr- Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- > <TAbort- <MAbort- >SERR- <PERR- INTx- > Latency: 0 (750ns min, 250ns max) > Interrupt: pin A routed to IRQ 30 > Region 0: I/O ports at d000 [size=8] > Region 1: I/O ports at cc00 [size=4] > Region 2: I/O ports at c880 [size=8] > Region 3: I/O ports at c800 [size=4] > Region 4: I/O ports at c480 [size=16] > Region 5: Memory at fae76000 (32-bit, non-prefetchable) [size=8K] > Capabilities: [44] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA > PME(D0-,D1-,D2-,D3hot-,D3cold-) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [8c] SATA HBA v1.0 InCfgSpace > Capabilities: [b0] MSI: Enable+ Count=1/8 Maskable- 64bit+ > Address: 00000000fee02004 Data: 0026 > Kernel driver in use: ahci I guess this is the relevant device? It is interesting that it advertises not supporting interrupt masking... Can you, you, out of curiosity, give the following hack a go? I would expect things to behave badly too (and maybe be even worse). But one way or another, it may give us a hint. Thanks, M. diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 0099a00af361..b3c0b9d07f17 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -205,7 +205,7 @@ static void __pci_msi_mask_desc(struct msi_desc *desc, u32 mask) if (desc->msi_attrib.is_msix) pci_msix_mask(desc); - else if (desc->msi_attrib.maskbit) + else //if (desc->msi_attrib.maskbit) pci_msi_mask(desc, mask); } @@ -216,7 +216,7 @@ static void __pci_msi_unmask_desc(struct msi_desc *desc, u32 mask) if (desc->msi_attrib.is_msix) pci_msix_unmask(desc); - else if (desc->msi_attrib.maskbit) + else //if (desc->msi_attrib.maskbit) pci_msi_unmask(desc, mask); } -- Without deviation from the norm, progress is not possible.
