From: Andreas Larsson <andreas@gaisler.com>
To: nyushchenko@dev.rtsoft.ru, Grant Likely <grant.likely@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Thomas Gleixner <tglx@linutronix.de>,
devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, lugovskoy@dev.rtsoft.ru,
sparclinux@vger.kernel.org, davem@davemloft.net
Subject: Re: [PATCH 00/21] add and use devm_irq_of_parse_and_map()
Date: Thu, 12 Jun 2014 12:03:34 +0200 [thread overview]
Message-ID: <53997AF6.1040003@gaisler.com> (raw)
In-Reply-To: <1401880402-30091-1-git-send-email-nyushchenko@dev.rtsoft.ru>
On 2014-06-04 13:13, nyushchenko@dev.rtsoft.ru wrote:
> Currently many device tree aware drivers use irq_of_parse_and_map() to get
> IRQ number and then devm_request_irq() to set up IRQ handler.
>
> This causes a problem for exit path and for error paths: undo action for
> irq_of_parse_and_map() is irq_dispose_mapping() that must not be called
> while IRQ handler is defined, but devres moves free_irq() out of driver
> so driver does not have safe place to call irq_dispose_mapping().
>
> So many drivers do not call irq_dispose_mapping() at all, others call it
> while IRQ handler is defined (which is incorrect and causes error messages
> in logs), even others refuse to use devres for managing IRQ handlers.
>
> This patchset adds devres version of irq_of_parse_and_map(), and updates
> in-tree users of both devres and irq_of_parse_and_map() to use
> devm_irq_of_parse_and_map() instead.
SPARC does not use OF_IRQ and has a different implementation of
irq_of_parse_and_map than the one in drivers/of/irq.c. All code
converted from irq_of_parse_and_map to devm_irq_of_parse_and_map in this
patch set will be unlinkable for SPARC. This includes SPI in general and
many drivers that are used for SPARC (of which several are currently
only used on SPARC platforms).
Best regards,
Andreas Larsson
next prev parent reply other threads:[~2014-06-12 10:03 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-04 11:13 [PATCH 00/21] add and use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 01/21] irq: add devres version of OF IRQ mapping routines nyushchenko
[not found] ` <1401880402-30091-2-git-send-email-nyushchenko-jFhMxQ4mL6a2X5qOxWx28w@public.gmane.org>
2014-06-04 13:39 ` Thomas Gleixner
2014-06-04 11:13 ` [PATCH 02/21] ata: use devm_irq_of_parse_and_map() where appropriate nyushchenko
2014-06-04 11:13 ` [PATCH 03/21] exynos5440-cpufreq: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 04/21] omap-sham: " nyushchenko
2014-06-04 11:13 ` [PATCH 05/21] dma: use devm_irq_of_parse_and_map() where appropriate nyushchenko
2014-06-04 11:13 ` [PATCH 06/21] mpc85xx_edac: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 07/21] gpio: use devm_irq_of_parse_and_map() where appropriate nyushchenko
2014-06-04 11:13 ` [PATCH 08/21] i2c: " nyushchenko
2014-06-04 11:13 ` [PATCH 09/21] apbps2: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 10/21] media: use devm_irq_of_parse_and_map() where appropriate nyushchenko
[not found] ` <1401880402-30091-1-git-send-email-nyushchenko-jFhMxQ4mL6a2X5qOxWx28w@public.gmane.org>
2014-06-04 11:13 ` [PATCH 11/21] mfd: " nyushchenko-jFhMxQ4mL6a2X5qOxWx28w
2014-06-17 15:12 ` Lee Jones
2014-06-17 15:36 ` Nikita Yushchenko
2014-06-18 8:48 ` Lee Jones
2014-06-18 11:31 ` Nikita Yushchenko
2014-06-18 12:20 ` Lee Jones
2014-06-04 11:13 ` [PATCH 14/21] net/ethernet: " nyushchenko-jFhMxQ4mL6a2X5qOxWx28w
2014-06-04 11:13 ` [PATCH 15/21] pinctrl: " nyushchenko-jFhMxQ4mL6a2X5qOxWx28w
2014-06-04 11:13 ` [PATCH 20/21] usb: " nyushchenko-jFhMxQ4mL6a2X5qOxWx28w
[not found] ` <1401880402-30091-21-git-send-email-nyushchenko-jFhMxQ4mL6a2X5qOxWx28w@public.gmane.org>
2014-06-16 9:35 ` Andreas Larsson
[not found] ` <539EBA6F.7060008-FkzTOoA/JUlBDgjK7y7TUQ@public.gmane.org>
2014-06-16 9:44 ` Nikita Yushchenko
[not found] ` <539EBC8E.6060602-jFhMxQ4mL6a2X5qOxWx28w@public.gmane.org>
2014-06-16 9:54 ` Andreas Larsson
2014-06-04 11:13 ` [PATCH 12/21] mpc5121_nfc: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 13/21] net/can: use devm_irq_of_parse_and_map() where appropriate nyushchenko
2014-06-04 11:13 ` [PATCH 16/21] bq24190_charger: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 17/21] rtc-mpc5121: " nyushchenko
2014-06-04 11:13 ` [PATCH 18/21] spi: use devm_irq_of_parse_and_map() where appropriate nyushchenko
2014-06-04 11:13 ` [PATCH 19/21] exynos_tmu: use devm_irq_of_parse_and_map() nyushchenko
2014-06-04 11:13 ` [PATCH 21/21] at91sam9_wdt: " nyushchenko
2014-06-12 10:03 ` Andreas Larsson [this message]
[not found] ` <5399AE1B.1080301@gaisler.com>
2014-06-12 19:02 ` [PATCH 00/21] add and " Nikita Yushchenko
2014-06-16 8:23 ` Andreas Larsson
[not found] ` <539EA986.1090501-FkzTOoA/JUlBDgjK7y7TUQ@public.gmane.org>
2014-06-16 8:36 ` Nikita Yushchenko
2014-06-16 9:29 ` Andreas Larsson
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