From mboxrd@z Thu Jan 1 00:00:00 1970 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 7AC4BC25B07 for ; Mon, 8 Aug 2022 01:55:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243564AbiHHBzh (ORCPT ); Sun, 7 Aug 2022 21:55:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243861AbiHHBwD (ORCPT ); Sun, 7 Aug 2022 21:52:03 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 082FB1A3AF; Sun, 7 Aug 2022 18:38:47 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 558CAB80DDF; Mon, 8 Aug 2022 01:38:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 53A8CC433D7; Mon, 8 Aug 2022 01:38:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659922725; bh=Ys9TIHJ9edNtGbf4XQYHNXCNCYaeXKhfNyZOp3p4xek=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GvsxiQg46bLh5vRVGiczVC5oBfIiL/BaG2Lij39wFtgwTYnfarrUULneRExfhWu7D EChZ9N+oqBzCdcJXZs2ZCUlCxEaP6mqp/hH7N8vd9pPr706Jhet/58k8xuWTX5x4eV vG5bdhggJ+IVJlgwtZjcKUMf9g5HKTT3otJoboCiAK3CBzi9P1dOipSxAF2vO+vI98 Lj9ufG6XcVk4+JOuYJYgQUOiqSR7zE4FTtVypL2Lq0uMR/m91TAxFazL2Dq0z6UyN+ D+X/wCqLuDKzjuAlCEaDcZGuaAFyfzn+95iwloVkK9fCPmXxwjB5u82B8bbEv+sZ4e GcTHI9FYPyjfA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Antonio Borneo , Marc Zyngier , Sasha Levin , tglx@linutronix.de Subject: [PATCH AUTOSEL 5.4 05/23] genirq: Don't return error on missing optional irq_request_resources() Date: Sun, 7 Aug 2022 21:38:12 -0400 Message-Id: <20220808013832.316381-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220808013832.316381-1-sashal@kernel.org> References: <20220808013832.316381-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Antonio Borneo [ Upstream commit 95001b756467ecc9f5973eb5e74e97699d9bbdf1 ] Function irq_chip::irq_request_resources() is reported as optional in the declaration of struct irq_chip. If the parent irq_chip does not implement it, we should ignore it and return. Don't return error if the functions is missing. Signed-off-by: Antonio Borneo Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220512160544.13561-1-antonio.borneo@foss.st.com Signed-off-by: Sasha Levin --- kernel/irq/chip.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 856f0297dc73..521121c2666c 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -1484,7 +1484,8 @@ int irq_chip_request_resources_parent(struct irq_data *data) if (data->chip->irq_request_resources) return data->chip->irq_request_resources(data); - return -ENOSYS; + /* no error on missing optional irq_chip::irq_request_resources */ + return 0; } EXPORT_SYMBOL_GPL(irq_chip_request_resources_parent); -- 2.35.1