From: Rabin Vincent <rabin@rab.in>
To: Meelis Roos <mroos@linux.ee>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>,
jaswinderrajput@gmail.com, linux-scsi@vger.kernel.org
Subject: Re: lockdep warning from firmware loader
Date: Fri, 1 May 2009 03:18:01 +0530 [thread overview]
Message-ID: <20090430214617.GA13109@debian> (raw)
In-Reply-To: <Pine.SOC.4.64.0904241017380.219@math.ut.ee>
(CCs added)
On Fri, Apr 24, 2009 at 10:21:13AM +0300, Meelis Roos wrote:
> This 2.6.30-rc3 running on SMP sparc64. Loading the qla1280 pci scsi
> driver causes a firmware load that in turn causes a lockdep warning like
> below. Firmware loading still seems to work fine.
[..]
> Apr 23 22:20:39 korvits kernel: [ 143.912020] qla1280: QLA1040 found on PCI bus 0, dev 3
> Apr 23 22:20:39 korvits kernel: [ 143.971811] PCI: Enabling device: (0002:00:03.0), cmd 7
> Apr 23 22:20:39 korvits kernel: [ 143.972842] ------------[ cut here ]------------
> Apr 23 22:20:39 korvits kernel: [ 144.026699] WARNING: at kernel/lockdep.c:2280 lockdep_trace_alloc+0xbc/0x100()
> Apr 23 22:20:39 korvits kernel: [ 144.113197] Modules linked in:
> Apr 23 22:20:39 korvits kernel: [ 144.149622] Call Trace:
> Apr 23 22:20:39 korvits kernel: [ 144.178818] [000000000045d7cc] warn_slowpath+0x6c/0xa0
> Apr 23 22:20:39 korvits kernel: [ 144.241329] [00000000004886fc] lockdep_trace_alloc+0xbc/0x100
> Apr 23 22:20:39 korvits kernel: [ 144.311140] [00000000004e67b8] kmem_cache_alloc+0x18/0x160
> Apr 23 22:20:39 korvits kernel: [ 144.377821] [0000000000604d68] _request_firmware+0x28/0x520
> Apr 23 22:20:39 korvits kernel: [ 144.445533] [000000000060531c] request_firmware+0x1c/0x40
> Apr 23 22:20:39 korvits kernel: [ 144.511180] [000000000061ba98] qla1280_load_firmware+0x2f8/0x7e0
> Apr 23 22:20:39 korvits kernel: [ 144.584108] [00000000006e1498] qla1280_probe_one+0x390/0x7a8
> Apr 23 22:20:39 korvits kernel: [ 144.652874] [00000000005ce55c] local_pci_probe+0x1c/0x40
> Apr 23 22:20:39 korvits kernel: [ 144.717468] [00000000005ce8e0] pci_device_probe+0x60/0xa0
> Apr 23 22:20:39 korvits kernel: [ 144.783106] [00000000005fff78] driver_probe_device+0x78/0x1a0
> Apr 23 22:20:39 korvits kernel: [ 144.852911] [000000000060012c] __driver_attach+0x8c/0xa0
> Apr 23 22:20:39 korvits kernel: [ 144.917505] [00000000005ff6c8] bus_for_each_dev+0x68/0xa0
> Apr 23 22:20:39 korvits kernel: [ 144.983141] [00000000005ffde0] driver_attach+0x20/0x40
> Apr 23 22:20:39 korvits kernel: [ 145.045657] [00000000005fee64] bus_add_driver+0x104/0x280
> Apr 23 22:20:39 korvits kernel: [ 145.111292] [0000000000600454] driver_register+0x74/0x180
> Apr 23 22:20:39 korvits kernel: [ 145.176928] [00000000005cedb4] __pci_register_driver+0x54/0xe0
> Apr 23 22:20:39 korvits kernel: [ 145.247808] ---[ end trace 6edbdc497698d192 ]---
> Apr 23 22:20:39 korvits kernel: [ 145.302997] qla1280 0002:00:03.0: firmware: using built-in firmware qlogic/1040.bin
This is because the driver calls request_firmware() with interrupts
disabled.
Rabin
prev parent reply other threads:[~2009-04-30 21:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-24 7:21 lockdep warning from firmware loader Meelis Roos
2009-04-30 21:48 ` Rabin Vincent [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090430214617.GA13109@debian \
--to=rabin@rab.in \
--cc=jaswinderrajput@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=mroos@linux.ee \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.