From patchwork Fri Feb 11 18:14:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 541927 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F62EC433EF for ; Fri, 11 Feb 2022 18:15:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352484AbiBKSPS (ORCPT ); Fri, 11 Feb 2022 13:15:18 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:55372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352287AbiBKSPR (ORCPT ); Fri, 11 Feb 2022 13:15:17 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AFCECF5; Fri, 11 Feb 2022 10:15:16 -0800 (PST) From: Sebastian Andrzej Siewior DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1644603314; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eDKahmXSrj6aQh1onAroOtRd7AsYDNa9qC35JKClxqs=; b=CYILQ0Dc2mFrwUzfRZlWoX/Fto5KkxILuys9OP+kveSZ9DGt7ih4yE4v/wmb4EglTWLSvT XGA7ctOzQTFZfGWd4oD/cG7pAJ3s/fv/voITyQo2UZ0CpOePIEf+3CrGu2h0jxl50bcyJx jpJrckncBh4BH/lqnJt5l+8To40UKGj2g5c66t6HPxId8u2Bli0VdnbK3ReZZIMaPX2GoL 8sKxSJQDtYTMrdyIdCieY2/GRg3plPMptUUp6+UH4snstQ3Dph032q6ztVNvVdytjBLWHQ xkjoHAbHpW6oiPdMUBEYACq6ozIni9RApUXYV6rVVFXzpCEUzIXRzl3nRzChDw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1644603314; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eDKahmXSrj6aQh1onAroOtRd7AsYDNa9qC35JKClxqs=; b=hzVc1i3Xdv73qi2TpafVh6jujTpWtWZtn7vIeUk34KcCTt0NqgG7oaozl6joDyHw8ohf9h m2qj/GNwfaMwJ7BQ== To: 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 , Hans de Goede , Jakub Kicinski , Johan Hovold , Lee Jones , Rui Miguel Silva , Thomas Gleixner , UNGLinuxDriver@microchip.com, Wolfram Sang , Woojung Huh , Sebastian Andrzej Siewior , Oleksandr Natalenko , Wolfram Sang Subject: [PATCH v4 1/7] genirq: Provide generic_handle_irq_safe(). Date: Fri, 11 Feb 2022 19:14:54 +0100 Message-Id: <20220211181500.1856198-2-bigeasy@linutronix.de> In-Reply-To: <20220211181500.1856198-1-bigeasy@linutronix.de> References: <20220211181500.1856198-1-bigeasy@linutronix.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Provide generic_handle_irq_safe() which can used from any context. Suggested-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior Reviewed-by: Hans de Goede Reviewed-by: Oleksandr Natalenko Reviewed-by: Wolfram Sang --- include/linux/irqdesc.h | 1 + kernel/irq/irqdesc.c | 23 +++++++++++++++++++++++ 2 files changed, 24 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..346d283d2da14 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -662,6 +662,29 @@ int generic_handle_irq(unsigned int irq) } EXPORT_SYMBOL_GPL(generic_handle_irq); +/** + * generic_handle_irq_safe - Invoke the handler for a particular irq from any + * context. + * @irq: The irq number to handle + * + * Returns: 0 on success, a negative value on error. + * + * This function can be called from any context (IRQ or process context). It + * will report an error if not invoked from IRQ context and the irq has been + * marked to enforce IRQ-context only. + */ +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