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Date: Fri, 28 Oct 2016 14:55:16 -0500
From: Nathan <nzimmer@....com>
To: Sean Young <sean@...s.org>
CC: <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
<gregkh@...uxfoundation.org>, <alan@...ux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: console issue since 3.6, console=ttyS1 hangs
Unfortunately the quirk crashed...
[ 3.985834] pnp 00:01: parse allocated resources
[ 3.986342] pnp 00:01: PNP0c02: calling
quirk_system_pci_resources+0x0/0x180
[ 3.987055] pnp 00:01: PNP0c02: calling quirk_intel_mch+0x0/0x1a0
[ 3.987613] pnp 00:01: PNP0c02: calling quirk_serial_port+0x0/0x140
[ 3.988246] BUG: unable to handle kernel NULL pointer dereference at
0000000000000001
[ 3.989044] IP: [<ffffffff813b52af>] quirk_serial_port+0xdf/0x140
[ 3.989600] PGD 0
[ 3.989798] Oops: 0002 [#1] SMP
[ 3.990089] Modules linked in:
[ 3.990476] CPU: 5 PID: 1 Comm: swapper/0 Not tainted
4.8.0-00001-ge41e11b #37
[ 3.991176] Hardware name: SGI.COM ICE-XIP119/S0751-Medina, BIOS
ma2e2054 02/05/2014
[ 3.994913] task: ffff88086c2b4040 task.stack: ffff88086c2b8000
[ 3.995461] RIP: 0010:[<ffffffff813b52af>] [<ffffffff813b52af>]
quirk_serial_port+0xdf/0x140
[ 3.996352] RSP: 0000:ffff88086c2bb998 EFLAGS: 00010282
[ 3.996909] RAX: 0000000000000037 RBX: ffff88106f108360 RCX:
0000000000000001
[ 3.997596] RDX: 0000000000000001 RSI: 0000000000000292 RDI:
ffff88106f108000
[ 3.998240] RBP: ffff88086c2bb9e8 R08: 0000000000000000 R09:
0000000000000000
[ 3.998852] R10: 000000000000000a R11: 0000000000000000 R12:
ffff88106f108000
[ 3.999506] R13: ffff88106f108360 R14: 00000000ffffffea R15:
ffff88084f2d3f40
[ 4.000181] FS: 0000000000000000(0000) GS:ffff88086fb40000(0000)
knlGS:0000000000000000
[ 4.000880] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.001363] CR2: 0000000000000001 CR3: 0000000001a06000 CR4:
00000000001406e0
[ 4.005050] Stack:
[ 4.005249] ffff88086c2bb9b8 0000000000000000 ffffffff81810846
ffff88086c2bb988
[ 4.006061] 00000000fbe1ffff ffffffff81aaf740 ffff88106f108000
ffff88106f108000
[ 4.006838] 00000000ffffffea ffff88084f2d3f40 ffff88086c2bba08
ffffffff813b48f2
[ 4.007586] Call Trace:
[ 4.007821] [<ffffffff813b48f2>] pnp_fixup_device+0x22/0x70
[ 4.008272] [<ffffffff813b0073>] __pnp_add_device+0x13/0xf0
[ 4.008758] [<ffffffff813a1c9d>] ? acpi_walk_resources+0xe3/0x114
[ 4.009272] [<ffffffff813b6550>] ?
pnpacpi_parse_allocated_resource+0xa0/0xa0
[ 4.009920] [<ffffffff813b01a0>] pnp_add_device+0x50/0xf0
[ 4.010481] [<ffffffff813a1bab>] ? acpi_walk_resource_buffer+0x10d/0x11c
[ 4.011127] [<ffffffff813b6550>] ?
pnpacpi_parse_allocated_resource+0xa0/0xa0
[ 4.011823] [<ffffffff813a1cbd>] ? acpi_walk_resources+0x103/0x114
[ 4.015512] [<ffffffff81b687ff>] pnpacpi_add_device+0x1ce/0x254
[ 4.016040] [<ffffffff81b688bb>] pnpacpi_add_device_handler+0x36/0x3a
[ 4.016678] [<ffffffff8139b2c5>] acpi_ns_get_device_callback+0x134/0x156
[ 4.017356] [<ffffffff8139ad78>] acpi_ns_walk_namespace+0x10a/0x251
[ 4.017977] [<ffffffff8139b191>] ? acpi_get_devices+0x10b/0x10b
[ 4.018556] [<ffffffff81b685bb>] ? ispnpidacpi+0x7b/0x7b
[ 4.019089] [<ffffffff8139b156>] acpi_get_devices+0xd0/0x10b
[ 4.019649] [<ffffffff81b68885>] ? pnpacpi_add_device+0x254/0x254
[ 4.020236] [<ffffffff81b68611>] pnpacpi_init+0x56/0x76
[ 4.020753] [<ffffffff81000380>] do_one_initcall+0xc0/0x1d0
[ 4.021299] [<ffffffff812e7444>] ? ida_pre_get+0x54/0xe0
[ 4.024877] [<ffffffff812398da>] ? proc_alloc_inum+0x4a/0xd0
[ 4.025453] [<ffffffff81b25d25>] ? repair_env_string+0x17/0x58
[ 4.026030] [<ffffffff810849e7>] ? parse_one+0xd7/0x180
[ 4.026557] [<ffffffff81084b7c>] ? parse_args+0xec/0x300
[ 4.027094] [<ffffffff81b25d0e>] ? kernel_init_freeable+0x2a3/0x2a3
[ 4.027703] [<ffffffff810a6c3e>] ? __wake_up+0x4e/0x70
[ 4.028222] [<ffffffff81b25a45>] do_basic_setup+0xb2/0xd8
[ 4.028765] [<ffffffff81b25d0e>] ? kernel_init_freeable+0x2a3/0x2a3
[ 4.029370] [<ffffffff81b25c85>] kernel_init_freeable+0x21a/0x2a3
[ 4.029945] [<ffffffff8157a939>] kernel_init+0x9/0x100
[ 4.030443] [<ffffffff81586ecf>] ret_from_fork+0x1f/0x40
[ 4.030961] [<ffffffff8157a930>] ? rest_init+0x80/0x80
[ 4.031476] Code: 01 00 00 4c 89 e7 4c 89 f6 e8 5e 08 f4 ff 85 c0 74
3c 48 8b 1b 4c 89 f2 4c 39 eb 0f 85 65 ff ff ff 48 85 d2 74 28 4d 85 ff
74 23 <48> c7 02 00 00 00 00 48 c7 42 08 00 00 00 00 48 c7 42 10 00 00
[ 4.036680] RIP [<ffffffff813b52af>] quirk_serial_port+0xdf/0x140
[ 4.037267] RSP <ffff88086c2bb998>
[ 4.037615] CR2: 0000000000000001
[ 4.037938] ---[ end trace 5bc20b620cbcf8e2 ]---
[ 4.038360] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00000009
[ 4.038360]
[ 4.039210] ---[ end Kernel panic - not syncing: Attempted to kill
init! exitcode=0x00000009
[ 4.039210]
The other thing I did as a diagnostic exercise was to look at the commit
I bisected too.
After some experimentation I found only I could revert a small part to
"fix" the issue.
This probably doesn't illuminate much but...
On 10/27/2016 03:19 PM, Sean Young wrote:
> On Wed, Oct 26, 2016 at 01:16:16PM -0500, Nathan Zimmer wrote:
>> On 10/25/2016 03:41 PM, Sean Young wrote:
>>> On Mon, Oct 24, 2016 at 04:49:25PM -0500, Nathan Zimmer wrote:
>>>> [ 1.565062] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
>>> The isa probe driver find the serial port.
>>>
>>>> [ 1.566453] serial 00:04: pnp_assign_resources, try dependent set 0
>>>> [ 1.567383] serial 00:04: couldn't assign io 0 (min 0x2f8 max 0x2f8)
>>> But then decides that the port is already in use (the existing serial driver).
>>>> [ 1.568366] serial 00:04: pnp_assign_resources failed (-16)
>>>> [ 1.569188] serial 00:04: unable to assign resources
>>>> [ 1.569924] serial: probe of 00:04 failed with error -16
>>> Please try and boot 3.7.0 with "8250.share_irqs=1", maybe it will pick
>>> irq 3 and it will be happy again, but that is just a guess.
>>>
>>> I think I have not fully understood what the failure is. Does the serial
>>> port not work or does the boot hang? What are the symptoms?
>> With console=ttyS1 the boot will "hang", sometimes it makes it all the way
>> through but may take 30 minutes, instead of the 2-4 minutes this box
> Where does it hang? Any error messages?
>
>>> We might be able to fix the problem with a pnp quirk but 3.7 is has not had
>>> any releases for a long time. We will need a reproduction on a concurrent
>>> kernel so a patch can be written for that.
>> Yes it still happens with 4.8+
>> I had only started dwelling on 3.6/3.7 since that is where it first appears
>> and don't have any attachment to those.
> Ok. Please try to following patch. I'm not sure it is good enough to be
> merged as-is, but should provide a start for testing. Output with
> CONFIG_PNP_DEBUG_MESSAGES should show only irq 3 is available for the
> serial port now.
>
> Sean
>
> From 3a1705a2e28f4385b778ad96d7c517b82ea860e2 Mon Sep 17 00:00:00 2001
> From: Sean Young <sean@...s.org>
> Date: Thu, 27 Oct 2016 20:13:50 +0100
> Subject: [PATCH] PNP: Add quirk for BIOS advertising wrong irqs for serial
> port
>
> Signed-off-by: Sean Young <sean@...s.org>
> ---
> drivers/pnp/quirks.c | 43 +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 43 insertions(+)
>
> diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
> index d28e3ab..8712161 100644
> --- a/drivers/pnp/quirks.c
> +++ b/drivers/pnp/quirks.c
> @@ -66,6 +66,48 @@ static void quirk_awe32_resources(struct pnp_dev *dev)
> }
> }
>
> +static void quirk_serial_port(struct pnp_dev *dev)
> +{
> + struct pnp_option *option;
> + struct pnp_irq *irq;
> + struct pnp_port *port;
> +
> + list_for_each_entry(option, &dev->options, list) {
> + if (!pnp_option_is_dependent(option))
> + continue;
> +
> + if (option->type == IORESOURCE_IO) {
> + port = &option->u.port;
> +
> + if (port->min != 0x2f8 || port->max != 0x2f8 ||
> + port->size != 8 || port->align != 1)
> + return;
> + } else if (option->type == IORESOURCE_IRQ) {
> + pnp_irq_mask_t map;
> +
> + irq = &option->u.irq;
> +
> + bitmap_zero(map.bits, PNP_IRQ_NR);
> + __set_bit(3, map.bits);
> + __set_bit(4, map.bits);
> + __set_bit(5, map.bits);
> + __set_bit(6, map.bits);
> + __set_bit(7, map.bits);
> + __set_bit(10, map.bits);
> + __set_bit(11, map.bits);
> + __set_bit(12, map.bits);
> +
> + if (!bitmap_equal(map.bits, irq->map.bits, PNP_IRQ_NR))
> + return;
> + }
> + }
> +
> + if (irq && port) {
> + bitmap_zero(irq->map.bits, PNP_IRQ_NR);
> + __set_bit(3, irq->map.bits);
> + }
> +}
> +
> static void quirk_cmi8330_resources(struct pnp_dev *dev)
> {
> struct pnp_option *option;
> @@ -448,6 +490,7 @@ static struct pnp_fixup pnp_fixups[] = {
> #ifdef CONFIG_PCI
> {"PNP0c02", quirk_intel_mch},
> #endif
> + {"PNP0c02", quirk_serial_port},
> {""}
> };
>
View attachment "hack.patch" of type "text/x-patch" (1478 bytes)
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