From: Thomas Gleixner <tglx@linutronix.de>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: Oleksij Rempel <linux@rempel-privat.de>,
linux-kernel@vger.kernel.org, jason@lakedaemon.net,
Oleksij Rempel <external.Oleksij.Rempel@de.bosch.com>
Subject: Re: [PATCH v2 2/2] ARM: irqchip: mxs: add Alpascale ASM9260 support
Date: Mon, 21 Sep 2015 11:06:45 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.11.1509211105500.5606@nanos> (raw)
In-Reply-To: <20150920122843.7cc93682@arm.com>
On Sun, 20 Sep 2015, Marc Zyngier wrote:
> > Uff... in one of earliest reviews i was asked to add lock..
> > I also was asked to add asm9260 to some existing driver. Not sure if it
> > is still making sense.
>
> Adding or removing a lock is not about what people ask you to do. It is
> about requirements dictated by either the HW (you need to perform
> a given sequence atomically with respect to another code sequence), the
> kernel, or both. So I'd like to understand what is the underlying
> reason for this lock. It is not disabling interrupts, so it could end
> up being called in an interrupt context -> deadlock.
The callback is always called with interrupts disabled, so that's a
non issue. But still, the rationale for that lock is unclear.
Thanks,
tglx
next prev parent reply other threads:[~2015-09-21 9:07 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-18 9:18 [PATCH v2 0/2] changelog Oleksij Rempel
2015-09-18 9:18 ` [PATCH v2 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-18 10:21 ` Thomas Gleixner
2015-09-18 9:18 ` [PATCH v2 2/2] ARM: irqchip: mxs: add Alpascale ASM9260 support Oleksij Rempel
2015-09-18 10:42 ` Possible Spam " Marc Zyngier
2015-09-19 5:53 ` Oleksij Rempel
2015-09-20 11:28 ` Marc Zyngier
2015-09-20 13:47 ` Oleksij Rempel
2015-09-21 9:06 ` Thomas Gleixner [this message]
2015-09-21 11:53 ` [PATCH v3 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-09-21 11:53 ` [PATCH v3 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-21 11:53 ` [PATCH v3 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-09-22 10:34 ` Thomas Gleixner
2015-09-23 16:20 ` [PATCH v4 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-09-23 16:20 ` [PATCH v4 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-09-29 16:06 ` Thomas Gleixner
2015-10-05 19:00 ` [PATCH v5 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-05 19:00 ` [PATCH v5 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-05 19:00 ` [PATCH v5 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-09 14:11 ` Thomas Gleixner
2015-10-10 13:08 ` [PATCH v6 0/2] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-10 13:08 ` [PATCH v6 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-11 17:58 ` Thomas Gleixner
2015-10-12 9:29 ` Oleksij Rempel
2015-10-12 9:32 ` Thomas Gleixner
2015-10-12 19:15 ` [PATCH v7 0/3] Add support for ASM9260 interrupt controller Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 1/3] ARM: irqchip: mxs: do panic if icoll_base == NULL Oleksij Rempel
2015-10-14 7:42 ` [tip:irq/core] irqchip/mxs: Panic if ioremap or domain creation fails tip-bot for Oleksij Rempel
2015-10-12 19:15 ` [PATCH v6 1/2] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-12 19:15 ` [PATCH v6 2/2] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 2/3] ARM: irqchip: mxs: prepare driver for HW with different offsets Oleksij Rempel
2015-10-14 7:42 ` [tip:irq/core] irqchip/mxs: Prepare driver for hardware " tip-bot for Oleksij Rempel
2015-10-12 19:15 ` [PATCH v7 3/3] ARM: irqchip: mxs: add Alphascale ASM9260 support Oleksij Rempel
2015-10-14 7:43 ` [tip:irq/core] irqchip/mxs: Add " tip-bot for Oleksij Rempel
2015-10-10 13:08 ` [PATCH v6 2/2] ARM: irqchip: mxs: add " Oleksij Rempel
2015-09-23 16:20 ` [PATCH v4 " Oleksij Rempel
2015-09-18 9:48 ` [PATCH v2 2/2] ARM: irqchip: mxs: add Alpascale " Oleksij Rempel
2015-09-18 10:16 ` [PATCH v2 0/2] changelog Marc Zyngier
2015-09-18 10:19 ` Thomas Gleixner
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