From: Jesse Hathaway <jesse@mbuki-mvuki.org>
To: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
linux-pci@vger.kernel.org
Subject: Regression causes a hang on boot with a Comtrol PCI card
Date: Wed, 13 Mar 2019 11:50:07 -0500 [thread overview]
Message-ID: <CANSNSoWiKd98Dt1N2sSjP9Af8zk1NPV-=3P4VLtFs_cSQG4RUg@mail.gmail.com> (raw)
Two regressions cause Linux to hang on boot when a Comtrol PCI card is present.
If I revert the following two commits, I can boot again and the card operates
without issue:
1302fcf0d03e (refs/bisect/bad) PCI: Configure *all* devices, not just
hot-added ones
1c3c5eab1715 sched/core: Enable might_sleep() and smp_processor_id()
checks early
; lspci -vs 82:00.0
82:00.0 Multiport serial controller: Comtrol Corporation Device 0061
Subsystem: Comtrol Corporation Device 0061
Flags: 66MHz, medium devsel, IRQ 35, NUMA node 1
Memory at c8004000 (32-bit, non-prefetchable) [size=4K]
Memory at c8000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [40] Hot-plug capable
Capabilities: [48] Power Management version 2
Kernel driver in use: rp2
Kernel modules: rp2
Is it possible that the problem is that the card claims to support Hot-plug,
but does not?
I would love to help fix this issue, please let me know what other information
would be helpful to provide.
; awk -f scripts/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
Linux tty01 5.0.1-amd64 #1 SMP Wed Mar 13 15:43:44 UTC 2019 x86_64 GNU/Linux
GNU C 6.3.0
GNU Make 4.1
Binutils 2.28
Util-linux 2.29.2
Mount 2.29.2
Linux C Library 2.24
Dynamic linker (ldd) 2.24
Procps 3.3.12
Sh-utils 8.26
Udev 232
Modules Loaded 8021q acpi_power_meter aesni_intel aes_x86_64
ahci autofs4 bonding button coretemp crc16 crc32c_generic crc32c_intel
crc32_pclmul crct10dif_pclmul cryptd crypto_simd dca dcdbas dm_mod drm
drm_kms_helper ehci_hcd ehci_pci evdev ext4 fscrypto garp
ghash_clmulni_intel glue_helper i2c_algo_bit igb intel_cstate
intel_powerclamp intel_rapl intel_rapl_perf intel_uncore ioatdma
ipmi_devintf ipmi_msghandler ipmi_si iptable_filter ip_tables
irqbypass iTCO_vendor_support iTCO_wdt ixgbe jbd2 kvm kvm_intel
libahci libata libcrc32c libphy llc lpc_ich mbcache mdio megaraid_sas
mei mei_me mgag200 mrp mxm_wmi nf_conntrack nf_defrag_ipv4
nf_defrag_ipv6 pcc_cpufreq pcspkr rp2 sb_edac scsi_mod sd_mod sg snd
snd_pcm snd_timer soundcore stp ttm usbcore wmi x86_pkg_temp_thermal
xfrm_algo x_tables xt_conntrack xt_tcpudp
next reply other threads:[~2019-03-13 16:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-13 16:50 Jesse Hathaway [this message]
2019-03-13 23:21 ` Regression causes a hang on boot with a Comtrol PCI card Bjorn Helgaas
2019-03-14 20:57 ` Jesse Hathaway
2019-03-21 20:36 ` Jesse Hathaway
2019-03-21 23:23 ` Bjorn Helgaas
2019-03-22 20:02 ` Jesse Hathaway
2019-04-01 19:43 ` Jesse Hathaway
2019-04-01 21:13 ` Bjorn Helgaas
2019-04-02 14:29 ` Alan Stern
2019-04-02 14:49 ` Mathias Nyman
2019-04-02 18:26 ` Alan Stern
2019-04-04 15:41 ` Jesse Hathaway
2019-04-04 17:16 ` Alan Stern
[not found] <CANSNSoWL-2hP6j+nQwjr26vUmvyJ_Y1c9CrJ4bHnuqYCXhecdg@mail.gmail.com>
2019-04-04 19:14 ` Alan Stern
2019-04-05 21:27 ` Jesse Hathaway
2019-04-06 15:32 ` Alan Stern
2019-04-15 21:47 ` Jesse Hathaway
2019-04-16 15:00 ` Alan Stern
2019-04-23 20:18 ` Jesse Hathaway
2019-04-24 14:20 ` Alan Stern
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