From: Thomas Gleixner <tglx@linutronix.de>
To: Anders Roxell <anders.roxell@linaro.org>
Cc: kgene@kernel.org, k.kozlowski@samsung.com, wsa@the-dreams.de,
ch.naveen@samsung.com, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
khilman@linaro.org, linux-rt-users@vger.kernel.org
Subject: Re: [PATCH] drivers: i2c: exynos5: irq spinlock rt-safe
Date: Tue, 25 Aug 2015 23:51:50 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.11.1508252349070.15006@nanos> (raw)
In-Reply-To: <1440489125-20082-1-git-send-email-anders.roxell@linaro.org>
On Tue, 25 Aug 2015, Anders Roxell wrote:
> The exynos5_i2c_message_start enables interrupts while holding the i2c
> lock which is sought by the irq handler. If an IRQ is received before
> this lock is released then a deadlock occurs.
That's crap. The interrupt handler runs in an irq thread as RT forces
all normal interrupts to that.
Thanks,
tglx
next prev parent reply other threads:[~2015-08-25 21:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-25 7:52 [PATCH] drivers: i2c: exynos5: irq spinlock rt-safe Anders Roxell
2015-08-25 21:51 ` Thomas Gleixner [this message]
2015-08-31 21:28 ` Anders Roxell
2015-09-03 21:06 ` [PATCHv2] " Anders Roxell
[not found] ` <1441314363-9836-1-git-send-email-anders.roxell-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-09-03 21:31 ` Thomas Gleixner
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=alpine.DEB.2.11.1508252349070.15006@nanos \
--to=tglx@linutronix.de \
--cc=anders.roxell@linaro.org \
--cc=ch.naveen@samsung.com \
--cc=k.kozlowski@samsung.com \
--cc=kgene@kernel.org \
--cc=khilman@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=wsa@the-dreams.de \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox