From: Wolfram Sang <wsa@kernel•org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix•de>
Cc: greybus-dev@lists•linaro.org, linux-i2c@vger•kernel.org,
linux-kernel@vger•kernel.org, linux-staging@lists•linux.dev,
linux-usb@vger•kernel.org, netdev@vger•kernel.org,
"David S. Miller" <davem@davemloft•net>,
Alex Elder <elder@kernel•org>, Arnd Bergmann <arnd@arndb•de>,
Greg Kroah-Hartman <gregkh@linuxfoundation•org>,
Hans de Goede <hdegoede@redhat•com>,
Jakub Kicinski <kuba@kernel•org>, Johan Hovold <johan@kernel•org>,
Lee Jones <lee.jones@linaro•org>,
Rui Miguel Silva <rmfrfs@gmail•com>,
Thomas Gleixner <tglx@linutronix•de>,
UNGLinuxDriver@microchip•com,
Woojung Huh <woojung.huh@microchip•com>,
Michael Below <below@judiz•de>,
Salvatore Bonaccorso <carnil@debian•org>
Subject: Re: [PATCH 2/7] i2c: core: Use generic_handle_irq_safe() in i2c_handle_smbus_host_notify().
Date: Thu, 27 Jan 2022 18:11:16 +0100 [thread overview]
Message-ID: <YfLSNNDVtAFx1P9u@shikoro> (raw)
In-Reply-To: <20220127113303.3012207-3-bigeasy@linutronix.de>
[-- Attachment #1: Type: text/plain, Size: 1075 bytes --]
On Thu, Jan 27, 2022 at 12:32:58PM +0100, Sebastian Andrzej Siewior wrote:
> The i2c-i801 driver invokes i2c_handle_smbus_host_notify() from his
> interrupt service routine. On PREEMPT_RT i2c-i801's handler is forced
> threaded with enabled interrupts which leads to a warning by
> handle_irq_event_percpu() assuming that irq_default_primary_handler()
> enabled interrupts.
>
> i2c-i801's interrupt handler can't be made non-threaded because the
> interrupt line is shared with other devices.
>
> Use generic_handle_irq_safe() which can invoked with disabled and enabled
> interrupts.
>
> Reported-by: Michael Below <below@judiz•de>
> Link: https://bugs.debian.org/1002537
> Cc: Salvatore Bonaccorso <carnil@debian•org>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix•de>
I guess you want this to go together with patch 1, so:
Acked-by: Wolfram Sang <wsa@kernel•org>
I agree with adding the kernel bugzilla entry at least:
https://bugzilla.kernel.org/show_bug.cgi?id=202453
Probably the others which Oleksandr metioned, too.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2022-01-27 17:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 11:32 [PATCH 0/7] Provide and use generic_handle_irq_safe() where appropriate Sebastian Andrzej Siewior
2022-01-27 11:32 ` [PATCH 1/7] genirq: Provide generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-01-27 11:48 ` Hans de Goede
2022-01-27 14:40 ` Oleksandr Natalenko
2022-01-27 17:03 ` Wolfram Sang
2022-01-31 10:47 ` Sebastian Andrzej Siewior
2022-01-28 10:18 ` Sergei Shtylyov
2022-01-31 10:51 ` Sebastian Andrzej Siewior
2022-01-27 11:32 ` [PATCH 2/7] i2c: core: Use generic_handle_irq_safe() in i2c_handle_smbus_host_notify() Sebastian Andrzej Siewior
2022-01-27 14:41 ` Oleksandr Natalenko
2022-01-31 11:09 ` Sebastian Andrzej Siewior
2022-01-27 17:11 ` Wolfram Sang [this message]
2022-01-31 11:07 ` Sebastian Andrzej Siewior
2022-01-27 11:32 ` [PATCH 3/7] i2c: cht-wc: Use generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-01-27 11:48 ` Hans de Goede
2022-01-27 17:16 ` Wolfram Sang
2022-01-31 11:10 ` Sebastian Andrzej Siewior
2022-01-27 11:33 ` [PATCH 4/7] mfd: hi6421-spmi-pmic: " Sebastian Andrzej Siewior
2022-01-28 10:23 ` Sergei Shtylyov
2022-01-28 13:33 ` Lee Jones
2022-01-28 15:28 ` Sergei Shtylyov
2022-01-28 16:44 ` Sergei Shtylyov
2022-01-28 16:50 ` Lee Jones
2022-01-28 19:37 ` Sergei Shtylyov
2022-01-31 11:16 ` Sebastian Andrzej Siewior
2022-01-27 11:33 ` [PATCH 5/7] mfd: ezx-pcap: " Sebastian Andrzej Siewior
2022-01-27 11:33 ` [PATCH 6/7] net: usb: lan78xx: " Sebastian Andrzej Siewior
2022-01-27 11:33 ` [PATCH 7/7] staging: greybus: gpio: " Sebastian Andrzej Siewior
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=YfLSNNDVtAFx1P9u@shikoro \
--to=wsa@kernel$(echo .)org \
--cc=UNGLinuxDriver@microchip$(echo .)com \
--cc=arnd@arndb$(echo .)de \
--cc=below@judiz$(echo .)de \
--cc=bigeasy@linutronix$(echo .)de \
--cc=carnil@debian$(echo .)org \
--cc=davem@davemloft$(echo .)net \
--cc=elder@kernel$(echo .)org \
--cc=gregkh@linuxfoundation$(echo .)org \
--cc=greybus-dev@lists$(echo .)linaro.org \
--cc=hdegoede@redhat$(echo .)com \
--cc=johan@kernel$(echo .)org \
--cc=kuba@kernel$(echo .)org \
--cc=lee.jones@linaro$(echo .)org \
--cc=linux-i2c@vger$(echo .)kernel.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-staging@lists$(echo .)linux.dev \
--cc=linux-usb@vger$(echo .)kernel.org \
--cc=netdev@vger$(echo .)kernel.org \
--cc=rmfrfs@gmail$(echo .)com \
--cc=tglx@linutronix$(echo .)de \
--cc=woojung.huh@microchip$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox