From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
"Russell King" <linux@arm.linux.org.uk>,
"Jason Wessel" <jason.wessel@windriver.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Alan Cox" <alan@linux.intel.com>,
"Arve Hjønnevåg" <arve@android.com>,
"Colin Cross" <ccross@android.com>,
"Brian Swetland" <swetland@google.com>,
"John Stultz" <john.stultz@linaro.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linaro-kernel@lists.linaro.org, patches@linaro.org,
kernel-team@android.com, kgdb-bugreport@lists.sourceforge.net,
linux-serial@vger.kernel.org
Subject: Re: [PATCH 06/14] tty/serial/core: Introduce poll_init callback
Date: Mon, 10 Sep 2012 12:13:20 +0100 [thread overview]
Message-ID: <20120910121320.03c9dfc7@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <20120910041335.GF29537@lizard>
> + tport = &state->port;
> + if (!(tport->flags & ASYNC_INITIALIZED) && port->ops->poll_init) {
> + mutex_lock(&tport->mutex);
> + ret = port->ops->poll_init(port);
> + /*
> + * We don't set ASYNCB_INITIALIZED as we only initialized the
> + * hw, e.g. state->xmit is still uninitialized.
> + */
> + mutex_unlock(&tport->mutex);
> + if (ret)
> + return ret;
> + }
What stops a parallel open or close changing ASYNC_INITIALIZED after you
test and before you lock ?
Alan
next prev parent reply other threads:[~2012-09-10 11:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-10 4:08 [PATCH v5 0/14] KGDB/KDB FIQ (NMI) debugger Anton Vorontsov
2012-09-10 4:11 ` [PATCH 01/14] serial/amba-pl011: fix ages old copy-paste errors Anton Vorontsov
2012-09-10 4:12 ` [PATCH 02/14] drivers/tty/serial/amba-pl0{10,11}.c: use clk_prepare_enable and clk_disable_unprepare Anton Vorontsov
2012-09-10 4:12 ` [PATCH 03/14] kernel/debug: Mask KGDB NMI upon entry Anton Vorontsov
2012-09-10 4:13 ` [PATCH 04/14] kdb: Implement disable_nmi command Anton Vorontsov
2012-09-10 4:13 ` [PATCH 05/14] kdb: Turn KGDB_KDB=n stubs into static inlines Anton Vorontsov
2012-09-10 4:13 ` [PATCH 06/14] tty/serial/core: Introduce poll_init callback Anton Vorontsov
2012-09-10 11:13 ` Alan Cox [this message]
2012-09-10 17:57 ` Anton Vorontsov
2012-09-10 19:18 ` Alan Cox
2012-09-10 4:13 ` [PATCH 07/14] tty/serial/amba-pl011: Implement " Anton Vorontsov
2012-09-10 4:13 ` [PATCH 08/14] tty/serial/kgdboc: Add and wire up clear_irqs callback Anton Vorontsov
2012-09-10 11:16 ` Alan Cox
2012-09-10 17:57 ` Anton Vorontsov
2012-09-10 19:19 ` Alan Cox
2012-09-10 20:13 ` Anton Vorontsov
2012-09-10 4:14 ` [PATCH 09/14] tty/serial/amba-pl011: Implement " Anton Vorontsov
2012-09-10 11:17 ` Alan Cox
2012-09-10 17:56 ` Anton Vorontsov
2012-09-10 4:14 ` [PATCH 10/14] tty/serial: Add kgdb_nmi driver Anton Vorontsov
2012-09-10 11:11 ` Alan Cox
2012-09-10 17:54 ` Anton Vorontsov
2012-09-10 4:14 ` [PATCH 11/14] ARM: Move some macros from entry-armv to entry-header Anton Vorontsov
2012-09-10 4:14 ` [PATCH 12/14] ARM: Add KGDB/KDB FIQ debugger generic code Anton Vorontsov
2012-09-10 4:14 ` [PATCH 13/14] ARM: VIC: Add a couple of low-level FIQ management helpers Anton Vorontsov
2012-09-10 4:14 ` [PATCH 14/14] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Anton Vorontsov
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=20120910121320.03c9dfc7@pyramind.ukuu.org.uk \
--to=alan@lxorguk.ukuu.org.uk \
--cc=akpm@linux-foundation.org \
--cc=alan@linux.intel.com \
--cc=anton.vorontsov@linaro.org \
--cc=arve@android.com \
--cc=ccross@android.com \
--cc=gregkh@linuxfoundation.org \
--cc=jason.wessel@windriver.com \
--cc=john.stultz@linaro.org \
--cc=kernel-team@android.com \
--cc=kgdb-bugreport@lists.sourceforge.net \
--cc=linaro-kernel@lists.linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=patches@linaro.org \
--cc=swetland@google.com \
/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
Powered by JetHome