From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 401E6568528; Wed, 9 Sep 2026 14:17:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788963475; cv=none; b=hoMm/FkYzLEPIjuTI5LrQWMr9wXH3D5G0by1wjh/xL2Dyx6yllj+wmt7WOmq96FApmOOghFTOckxXiRSwX5yyzr83TOxRnqR9T63eCflhMHbX/50pQ6SaKm9GE3Z3KcX4KojtiiWF30FRjIDv8YpZF0SlotWQJ21fbq6N9lzJOk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788963475; c=relaxed/simple; bh=9Fc53dd+hYP7i66wXLv6f5TOd6m89BpomdYMHkGLQQc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oTM5076pqt2HlVPAqpNC8NWagfRivG+la3nI+BSTKzX0wQzUVP+SF3aKeRrHN1sZ4JrZ/onlWxAVBArrnoNpkTH8yi598uhHaMDCttD4muGOSIeaDg1A4ysSNf3h+WkBs4uf0/rjzPe74xzf5YsWjvfMJ+Nt+DqOWJjq6xwPuh8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=e1oErtvj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="e1oErtvj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9AC681F00A3A; Wed, 9 Sep 2026 14:17:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788963474; bh=+8iOsFMO1bsppv9hx8kR9q5246OYP3Kk185CrdI+bY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=e1oErtvjGj4SBLVyb3cRDoBRps3eXbO1bKqfsVt/f7LVNRSzvb6QhUYojPHo87bXX V2IVl++LMr4XBOPWwaukYLnqN+zoVHg0hlTBKyualiAkR5esnhk5ynP8F1WEf93Qyz ku49IFC4jSHlGaQg1tYRygfl1LqiaNvasYfddNbQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lad Prabhakar , Wolfram Sang , Alexandre Belloni Subject: [PATCH 6.18 092/583] rtc: rzn1: Disable alarm interrupt before reprogramming alarm registers Date: Wed, 9 Sep 2026 15:36:17 +0200 Message-ID: <20260909134241.312403751@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909134237.773280130@linuxfoundation.org> References: <20260909134237.773280130@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lad Prabhakar commit 51458d5b0a1cfb1b6013400abc95aadf16ed2a57 upstream. rzn1_rtc_set_alarm() updates RZN1_RTC_ALM, RZN1_RTC_ALH and RZN1_RTC_ALW using separate MMIO writes without first disabling the alarm interrupt. If a previous alarm is still enabled, the interrupt can fire while the alarm registers contain a mixture of old and newly written values. Fix this by disabling the alarm interrupt before reprogramming ALM, ALH and ALW with a call to rzn1_rtc_alarm_irq_enable(). Fixes: b5ad1bf00d2c4 ("rtc: rzn1: Add alarm support") Cc: stable@vger.kernel.org Signed-off-by: Lad Prabhakar Reviewed-by: Wolfram Sang Tested-by: Wolfram Sang Link: https://patch.msgid.link/20260821211032.13554-7-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Alexandre Belloni Signed-off-by: Greg Kroah-Hartman --- drivers/rtc/rtc-rzn1.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/rtc/rtc-rzn1.c +++ b/drivers/rtc/rtc-rzn1.c @@ -281,6 +281,11 @@ static int rzn1_rtc_set_alarm(struct dev if (time_after(alarm, farest)) return -ERANGE; + /* Disable alarm interrupts before reprogramming the alarm. */ + ret = rzn1_rtc_alarm_irq_enable(dev, 0); + if (ret) + return ret; + writel(bin2bcd(tm->tm_min), rtc->base + RZN1_RTC_ALM); writel(bin2bcd(tm->tm_hour), rtc->base + RZN1_RTC_ALH); writel(BIT(tm->tm_wday), rtc->base + RZN1_RTC_ALW);