From: Fengguang Wu <fengguang.wu@intel.com>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: ming.lei@canonical.com, akpm@linux-foundation.org,
mmarek@suse.com, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, markivx@codeaurora.org,
stephen.boyd@linaro.org, zohar@linux.vnet.ibm.com,
broonie@kernel.org, tiwai@suse.de, johannes@sipsolutions.net,
chunkeey@googlemail.com, hauke@hauke-m.de,
jwboyer@fedoraproject.org, dmitry.torokhov@gmail.com,
dwmw2@infradead.org, jslaby@suse.com,
torvalds@linux-foundation.org, luto@amacapital.net,
rpurdie@rpsys.net, j.anaszewski@samsung.com,
Abhay_Salunke@dell.com, Julia.Lawall@lip6.fr,
Gilles.Muller@lip6.fr, nicolas.palix@imag.fr, teg@jklm.no,
dhowells@redhat.com, martin.blumenstingl@googlemail.com,
nbd@nbd.name, mark.rutland@arm.com, robh+dt@kernel.org,
arend.vanspriel@broadcom.com, dev@kresin.me,
kvalo@codeaurora.org
Subject: Re: [PATCH v2 0/5] firmware: add SmPL grammar to avoid issues
Date: Thu, 14 Jul 2016 07:52:07 +0800 [thread overview]
Message-ID: <20160713235207.GA20304@wfg-t540p.sh.intel.com> (raw)
In-Reply-To: <20160707005644.GF31219@wotan.suse.de>
Hi Luis,
On Thu, Jul 07, 2016 at 02:56:44AM +0200, Luis R. Rodriguez wrote:
>On Thu, Jun 16, 2016 at 03:54:16PM -0700, Luis R. Rodriguez wrote:
>> The firmware API has had some issues a while ago, some of this is
>> not well documented, and its still hard to grasp. This documents
>> some of these issues, adds SmPL grammar rules to enable us to hunt
>> for issues, and annotations to help us with our effort to finally
>> compartamentalize that pesky usermode helper.
>>
>> Previously this was just one patch, the grammar rule to help
>> find request firmware API users on init or probe, this series
>> extends that effort with usermode helper grammar rules, and some
>> annotations and documentation on the firmware_class driver to
>> avoid further issues. Documenting the usermode helper and making
>> it clear why we cannot remove it is important for analysis for
>> the next series which adds the new flexible sysdata firmware API.
>>
>> This series depends on the coccicheck series which enables
>> annotations on coccinelle patches to require a specific
>> version of coccinelle [0], as such coordination with Michal is
>> in order.
>
>Michal is out until July 11, and upon further thought such coordination
>is not need, the annotation is in place as comments and as such
>merging this now won't have any negative effects other than the version
>check. Also the patches in question for the coccicheck change are all
>acked now and I expect them to be merged anyway.
>
>Which tree should firmware changes go through ?
>> This series is also further extended next with the new sydata
>> API, the full set of changes is available on my linux-next tree [1].
>>
>> Perhaps now a good time to discuss -- if 0-day should enable the rule
>> scripts/coccinelle/api/request_firmware-usermode.cocci to be called on
>> every 0-day iteration, it runs rather fast and it should help police
>> against avoiding futher explicit users of the usermode helper.
>
>And if we are going to merge this anyone oppose enabling hunting
>for further explicit users of the usermode helper using grammar through
>0-day ?
When *.cocci scripts lands upstream they'll be auto picked up by the
0-day bot to guard new patches/commits. Are there further steps 0-day
should do for request_firmware-upstream.cocci?
Thanks,
Fengguang
>>
>> [0] https://lkml.kernel.org/r/1466116292-21843-1-git-send-email-mcgrof@kernel.org
>> [1] https://git.kernel.org/cgit/linux/kernel/git/mcgrof/linux-next.git/log/?h=20160616-sysdata-v2
>>
>> Luis R. Rodriguez (5):
>> MAINTAINERS: extend firmware_class maintainer list
>> firmware: annotate thou shalt not request fw on init or probe
>> firmware: update usermode helper docs and add SmPL report
>> firmware: add usermode helper DECLARE_FW_LOADER_USER() annotation
>> firmware: fix fw cache to avoid usermode helper on suspend
>>
>> Documentation/firmware_class/README | 59 +++++++++-
>> MAINTAINERS | 1 +
>> drivers/base/Kconfig | 2 +-
>> drivers/base/firmware_class.c | 2 +-
>> drivers/firmware/dell_rbu.c | 1 +
>> drivers/leds/leds-lp55xx-common.c | 1 +
>> include/linux/firmware.h | 7 ++
>> .../request_firmware-avoid-init-probe-init.cocci | 130 +++++++++++++++++++++
>> .../coccinelle/api/request_firmware-usermode.cocci | 44 +++++++
>> 9 files changed, 240 insertions(+), 7 deletions(-)
>> create mode 100644 scripts/coccinelle/api/request_firmware-avoid-init-probe-init.cocci
>> create mode 100644 scripts/coccinelle/api/request_firmware-usermode.cocci
>>
>> --
>> 2.8.2
>>
>>
>
>--
>Luis Rodriguez, SUSE LINUX GmbH
>Maxfeldstrasse 5; D-90409 Nuernberg
next prev parent reply other threads:[~2016-07-13 23:52 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 22:54 [PATCH v2 0/5] firmware: add SmPL grammar to avoid issues Luis R. Rodriguez
2016-06-16 22:54 ` [PATCH v2 1/5] MAINTAINERS: extend firmware_class maintainer list Luis R. Rodriguez
2016-06-16 22:54 ` [PATCH v2 2/5] firmware: annotate thou shalt not request fw on init or probe Luis R. Rodriguez
2016-08-24 6:55 ` Daniel Vetter
2016-08-24 20:39 ` Luis R. Rodriguez
2016-08-25 11:05 ` Daniel Vetter
2016-08-25 19:41 ` Luis R. Rodriguez
2016-08-25 20:10 ` Daniel Vetter
2016-08-25 20:25 ` Luis R. Rodriguez
2016-08-25 20:30 ` Dmitry Torokhov
2016-09-02 23:59 ` Luis R. Rodriguez
2016-09-03 0:20 ` [RFC] fs: add userspace critical mounts event support Luis R. Rodriguez
2016-09-03 4:11 ` Linus Torvalds
2016-09-03 4:20 ` Dmitry Torokhov
[not found] ` <CA+55aFz4q5peXAeY9h8o3he7R=wXrBSYkOjMM9TehOw=pPoS+Q@mail.gmail.com>
2016-09-03 17:49 ` Dmitry Torokhov
2016-09-03 18:01 ` Linus Torvalds
2016-09-03 18:10 ` Dmitry Torokhov
2016-09-06 21:52 ` Luis R. Rodriguez
2016-09-06 22:28 ` Bjorn Andersson
2016-09-06 23:14 ` Luis R. Rodriguez
2016-09-24 1:37 ` Herbert, Marc
2016-09-24 17:41 ` Dmitry Torokhov
2016-10-05 0:00 ` Luis R. Rodriguez
2016-10-05 0:12 ` Linus Torvalds
2016-10-05 0:24 ` Luis R. Rodriguez
2016-10-05 0:32 ` Linus Torvalds
2016-10-05 17:38 ` Luis R. Rodriguez
2016-10-05 1:48 ` Josh Triplett
2016-10-05 1:58 ` Linus Torvalds
2016-09-06 17:46 ` Bjorn Andersson
2016-09-06 18:32 ` Linus Torvalds
2016-09-06 21:11 ` Bjorn Andersson
2016-09-06 21:50 ` Linus Torvalds
2016-09-06 23:04 ` Luis R. Rodriguez
2016-09-24 2:51 ` Herbert, Marc
2016-10-04 23:28 ` Luis R. Rodriguez
2016-09-06 22:32 ` Luis R. Rodriguez
2016-09-14 2:38 ` Rob Landley
2016-10-05 18:00 ` Luis R. Rodriguez
2016-10-05 18:08 ` Linus Torvalds
2016-10-05 19:46 ` Luis R. Rodriguez
2016-11-08 22:47 ` Luis R. Rodriguez
2016-11-09 9:13 ` Daniel Wagner
2016-11-09 23:40 ` Luis R. Rodriguez
2016-11-15 9:28 ` Johannes Berg
2016-06-16 22:54 ` [PATCH v2 3/5] firmware: update usermode helper docs and add SmPL report Luis R. Rodriguez
2016-06-16 22:54 ` [PATCH v2 4/5] firmware: add usermode helper DECLARE_FW_LOADER_USER() annotation Luis R. Rodriguez
2016-06-16 22:54 ` [PATCH v2 5/5] firmware: fix fw cache to avoid usermode helper on suspend Luis R. Rodriguez
2016-07-07 0:56 ` [PATCH v2 0/5] firmware: add SmPL grammar to avoid issues Luis R. Rodriguez
2016-07-13 21:47 ` Luis R. Rodriguez
2016-07-28 0:41 ` Luis R. Rodriguez
2016-08-03 14:50 ` Luis R. Rodriguez
2016-08-03 15:04 ` Greg KH
2016-08-03 17:06 ` Luis R. Rodriguez
2016-08-03 19:32 ` Greg KH
2016-08-03 19:46 ` Luis R. Rodriguez
2016-07-13 23:52 ` Fengguang Wu [this message]
2016-07-14 2:15 ` Luis R. Rodriguez
2016-07-14 2:23 ` Fengguang Wu
2016-07-14 3:08 ` Luis R. Rodriguez
2016-07-14 3:35 ` Fengguang Wu
2016-08-24 0:45 ` [PATCH v3 " mcgrof
2016-08-24 0:45 ` [PATCH v3 1/5] MAINTAINERS: extend firmware_class maintainer list mcgrof
2016-08-24 0:45 ` [PATCH v3 2/5] firmware: annotate thou shalt not request fw on init or probe mcgrof
2016-08-24 8:17 ` Gabriel Paubert
2016-09-02 18:26 ` Luis R. Rodriguez
2016-08-24 0:45 ` [PATCH v3 3/5] firmware: update usermode helper docs and add SmPL report mcgrof
2016-08-24 0:45 ` [PATCH v3 4/5] firmware: add usermode helper DECLARE_FW_LOADER_USER() annotation mcgrof
2016-08-24 0:45 ` [PATCH v3 5/5] firmware: fix fw cache to avoid usermode helper on suspend mcgrof
2016-08-31 7:03 ` Daniel Wagner
2016-09-02 18:13 ` Luis R. Rodriguez
2016-09-07 0:42 ` [PATCH v4 0/5] firmware: add SmPL grammar to avoid issues Luis R. Rodriguez
2016-09-07 0:42 ` [PATCH v4 1/5] MAINTAINERS: extend firmware_class maintainer list Luis R. Rodriguez
2016-09-07 6:43 ` Greg KH
2016-09-08 14:58 ` Luis R. Rodriguez
2016-09-08 15:25 ` Ming Lei
2016-09-07 0:42 ` [PATCH v4 2/5] firmware: annotate thou shalt not request fw on init or probe Luis R. Rodriguez
2016-09-07 0:42 ` [PATCH v4 3/5] firmware: update usermode helper docs and add SmPL report Luis R. Rodriguez
2016-09-07 0:42 ` [PATCH v4 4/5] firmware: add usermode helper DECLARE_FW_LOADER_USER() annotation Luis R. Rodriguez
2016-09-07 0:42 ` [PATCH v4 5/5] firmware: fix fw cache to avoid usermode helper on suspend Luis R. Rodriguez
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