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(2001-1c00-0c1e-bf00-1db8-22d3-1bc9-8ca1.cable.dynamic.v6.ziggo.nl. [2001:1c00:c1e:bf00:1db8:22d3:1bc9:8ca1]) by smtp.gmail.com with ESMTPSA id cf13sm8735609ejb.141.2022.01.27.03.48.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Jan 2022 03:48:02 -0800 (PST) Message-ID: Date: Thu, 27 Jan 2022 12:48:01 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: Re: [PATCH 1/7] genirq: Provide generic_handle_irq_safe(). Content-Language: en-US To: Sebastian Andrzej Siewior , 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 Cc: "David S. Miller" , Alex Elder , Arnd Bergmann , Greg Kroah-Hartman , Jakub Kicinski , Johan Hovold , Lee Jones , Rui Miguel Silva , Thomas Gleixner , UNGLinuxDriver@microchip.com, Wolfram Sang , Woojung Huh References: <20220127113303.3012207-1-bigeasy@linutronix.de> <20220127113303.3012207-2-bigeasy@linutronix.de> From: Hans de Goede In-Reply-To: <20220127113303.3012207-2-bigeasy@linutronix.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hi, On 1/27/22 12:32, Sebastian Andrzej Siewior wrote: > Provide generic_handle_irq_safe() which can be used can used from any > context. > > Suggested-by: Thomas Gleixner > Signed-off-by: Sebastian Andrzej Siewior Thanks, patch looks good to me: Reviewed-by: Hans de Goede Regards, Hans > --- > include/linux/irqdesc.h | 1 + > kernel/irq/irqdesc.c | 21 +++++++++++++++++++++ > 2 files changed, 22 insertions(+) > > diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h > index 93d270ca0c567..a77584593f7d1 100644 > --- a/include/linux/irqdesc.h > +++ b/include/linux/irqdesc.h > @@ -160,6 +160,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc) > > int handle_irq_desc(struct irq_desc *desc); > int generic_handle_irq(unsigned int irq); > +int generic_handle_irq_safe(unsigned int irq); > > #ifdef CONFIG_IRQ_DOMAIN > /* > diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c > index 2267e6527db3c..97223df2f460e 100644 > --- a/kernel/irq/irqdesc.c > +++ b/kernel/irq/irqdesc.c > @@ -662,6 +662,27 @@ int generic_handle_irq(unsigned int irq) > } > EXPORT_SYMBOL_GPL(generic_handle_irq); > > +/** > + * generic_handle_irq_safe - Invoke the handler for a particular irq > + * @irq: The irq number to handle > + * > + * Returns: 0 on success, or -EINVAL if conversion has failed > + * > + * This function must be called either from an IRQ context with irq regs > + * initialized or with care from any context. > + */ > +int generic_handle_irq_safe(unsigned int irq) > +{ > + unsigned long flags; > + int ret; > + > + local_irq_save(flags); > + ret = handle_irq_desc(irq_to_desc(irq)); > + local_irq_restore(flags); > + return ret; > +} > +EXPORT_SYMBOL_GPL(generic_handle_irq_safe); > + > #ifdef CONFIG_IRQ_DOMAIN > /** > * generic_handle_domain_irq - Invoke the handler for a HW irq belonging >