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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>,
	Oleksandr Natalenko <oleksandr@natalenko.name>
Subject: Re: [PATCH v4 2/7] i2c: core: Use generic_handle_irq_safe() in i2c_handle_smbus_host_notify().
Date: Wed, 23 Feb 2022 14:21:32 +0100	[thread overview]
Message-ID: <YhY03EojmT3eaIcR@ninjato> (raw)
In-Reply-To: <20220211181500.1856198-3-bigeasy@linutronix.de>

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On Fri, Feb 11, 2022 at 07:14:55PM +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>
> Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name>
> Acked-by: Wolfram Sang <wsa@kernel.org>

Is this 5.17 material? Or is 5.18 fine, too?


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  reply	other threads:[~2022-02-23 13:21 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-11 18:14 [PATCH v4 0/7] Provide and use generic_handle_irq_safe() where appropriate Sebastian Andrzej Siewior
2022-02-11 18:14 ` [PATCH v4 1/7] genirq: Provide generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-02-21 11:19   ` [tip: irq/core] " tip-bot2 for Sebastian Andrzej Siewior
2022-02-11 18:14 ` [PATCH v4 2/7] i2c: core: Use generic_handle_irq_safe() in i2c_handle_smbus_host_notify() Sebastian Andrzej Siewior
2022-02-23 13:21   ` Wolfram Sang [this message]
2022-02-25 22:26     ` Sebastian Andrzej Siewior
2022-03-01 15:06       ` Wolfram Sang
2022-02-11 18:14 ` [PATCH v4 3/7] i2c: cht-wc: Use generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-02-23 13:21   ` Wolfram Sang
2022-02-11 18:14 ` [PATCH v4 4/7] misc: hi6421-spmi-pmic: " Sebastian Andrzej Siewior
2022-03-02 21:35   ` [tip: irq/core] " tip-bot2 for Sebastian Andrzej Siewior
2022-02-11 18:14 ` [PATCH v4 5/7] mfd: ezx-pcap: " Sebastian Andrzej Siewior
2022-03-02 21:35   ` [tip: irq/core] " tip-bot2 for Sebastian Andrzej Siewior
2022-02-11 18:14 ` [PATCH v4 6/7] net: usb: lan78xx: " Sebastian Andrzej Siewior
2022-03-02 21:35   ` [tip: irq/core] " tip-bot2 for Sebastian Andrzej Siewior
2022-02-11 18:15 ` [PATCH v4 7/7] staging: greybus: gpio: " Sebastian Andrzej Siewior
2022-03-02 21:35   ` [tip: irq/core] " tip-bot2 for Sebastian Andrzej Siewior
2022-02-15 14:36 ` [PATCH v4 0/7] Provide and use generic_handle_irq_safe() where appropriate Lee Jones
2022-02-15 14:50   ` Sebastian Andrzej Siewior
2022-02-15 15:16     ` Lee Jones
2022-02-15 15:33       ` Sebastian Andrzej Siewior
2022-02-15 15:42         ` Lee Jones
2022-02-15 15:46           ` Sebastian Andrzej Siewior
2022-02-21  9:57           ` Thomas Gleixner
2022-02-21 11:33             ` Thomas Gleixner
2022-02-21 12:38               ` Lee Jones
2022-02-23 13:19               ` Wolfram Sang

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