From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D456428982F; Mon, 5 May 2025 23:14:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746486860; cv=none; b=lNLUwOL7b4Lnx/F3UDnhoIn3+tWGuuJJAtOmdFs2r71oTS+zzjtHhGSd5OcRTk4V0lIkY74NG9oNN+H7I/ks/F7vnWxHLvjmdvh7tNzUuEAchZ4FZQ+Xhdn84uiySjObbsheIq//jGnZWOv9dymQP70UbDvUYxqHizLzFNDc9sU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746486860; c=relaxed/simple; bh=B4/AFmH4EzCm+/gzXspUOA/ZQOae4G4h8zpgvZNFaUI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=F46b1Ryrcv9CAtMQjnXHQ8ZDroxgolwy2heDTFJFMJPzDccvRbcnLCL/HTR8xkgXOxS7rYLb6+6HlJrsDZrVhCjpmdRwWJQbEaFfplcBZ1+Sgk9EweDbZdz9JmGpA65nC6t6x+ZxnL2KzhaEspfxUyLhhYHtE8MsT6PiIzMK1qY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MO7eDF7N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MO7eDF7N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03528C4CEED; Mon, 5 May 2025 23:14:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746486860; bh=B4/AFmH4EzCm+/gzXspUOA/ZQOae4G4h8zpgvZNFaUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MO7eDF7Nx1f0WrpHwAd5nrTmkCoVhkCad9iJKRLOSUPrF8/Dj/l2zDdoeEXV7pbIV fOC8Yu/aBpxQ1Fbku/aWZzhNabiljJx9Ff+X53QehDPTrxomdpwTfTs/FSa1QeNA8z k/L0Mxpw8V+E0fUnOBp9yfi+fA397lJW8ZSl8M0qzGf2UFmWs3k4t1XVKV0xYUQVpt 0YTbkeXBU/6pEarqk45oOnbMzV1nWMOfCwIPlV9d9FNKAGcwrpQ9e7Nspjc7fwPHNO oexFm7i8eeR/0Vtxi7CiQrvnwFhRMvBbBJE6bAJp++HDaoFlKYe75gD8Tz45vJ3xPY jMyudL0nB8nHw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nick Hu , Anup Patel , Daniel Lezcano , Alexandre Ghiti , Sasha Levin , tglx@linutronix.de, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org Subject: [PATCH AUTOSEL 5.15 030/153] clocksource/drivers/timer-riscv: Stop stimecmp when cpu hotplug Date: Mon, 5 May 2025 19:11:17 -0400 Message-Id: <20250505231320.2695319-30-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505231320.2695319-1-sashal@kernel.org> References: <20250505231320.2695319-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.181 Content-Transfer-Encoding: 8bit From: Nick Hu [ Upstream commit 70c93b026ed07078e933583591aa9ca6701cd9da ] Stop the timer when the cpu is going to be offline otherwise the timer interrupt may be pending while performing power-down. Suggested-by: Anup Patel Link: https://lore.kernel.org/lkml/20240829033904.477200-3-nick.hu@sifive.com/T/#u Signed-off-by: Nick Hu Reviewed-by: Anup Patel Acked-by: Daniel Lezcano Link: https://lore.kernel.org/r/20250219114135.27764-3-nick.hu@sifive.com Signed-off-by: Alexandre Ghiti Signed-off-by: Sasha Levin --- drivers/clocksource/timer-riscv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c index c51c5ed15aa75..427c92dd048c4 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -75,7 +75,13 @@ static int riscv_timer_starting_cpu(unsigned int cpu) static int riscv_timer_dying_cpu(unsigned int cpu) { + /* + * Stop the timer when the cpu is going to be offline otherwise + * the timer interrupt may be pending while performing power-down. + */ + riscv_clock_event_stop(); disable_percpu_irq(riscv_clock_event_irq); + return 0; } -- 2.39.5