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 A5F081ABEC0; Thu, 15 Aug 2024 14:03:38 +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=1723730618; cv=none; b=R/I7cuYrHy10mocDG2XfphDCokgeaymnBPK/znFnc5WgDPNX9wf8atLdx/U8EA1XV4RbNAIrtdCwz7SrbIHqZ7NAbNJgusX4HNkJQQLB7QmKxjE13ePc/6yPosjtDr17o54kki9Ns3whrVMhRUaI7bZHZg8V57gntNehUF7XMNk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723730618; c=relaxed/simple; bh=8fPWL+HUA9CweTFaIa/iTrJEAYZWTdZrOnNCKitCYYo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rV2bWaRfhX3tfENjBisv9Gg23h9E8kb0gFkLhO4D6/mdrkP5BKnZXWyoJC47q+75bLhJ06l6oHEhryd97Doq9LT04Ec5bNFu/cKzF59aGr350abTyPbTvaWu1Tfu9PLphVHxBxolD2aPQlsbWjDJfxZBpesJBYiq3Wmx0JsYTgs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2UN3C1Mz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2UN3C1Mz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23D45C32786; Thu, 15 Aug 2024 14:03:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723730618; bh=8fPWL+HUA9CweTFaIa/iTrJEAYZWTdZrOnNCKitCYYo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2UN3C1MzbWsGNxyW3LA5GYCIxT9Gd/ibgEMmIkOyanvu6Yz47vlp0h4Pdq2zOne9q FAZVaBb3m4gZ7DQV6UAy8nc05+Hy/cLZWeN/i+xIZGVYRQJUIGvDB/AMAhIuBJc5Py xW4ouupwC8K5eHn0kkqMVoTLVFXdElmm4ygYpClI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arseniy Krasnov , Thomas Gleixner , Sasha Levin Subject: [PATCH 5.15 434/484] irqchip/meson-gpio: Convert meson_gpio_irq_controller::lock to raw_spinlock_t Date: Thu, 15 Aug 2024 15:24:52 +0200 Message-ID: <20240815131958.223287288@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815131941.255804951@linuxfoundation.org> References: <20240815131941.255804951@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arseniy Krasnov [ Upstream commit f872d4af79fe8c71ae291ce8875b477e1669a6c7 ] This lock is acquired under irq_desc::lock with interrupts disabled. When PREEMPT_RT is enabled, 'spinlock_t' becomes preemptible, which results in invalid lock acquire context; [ BUG: Invalid wait context ] swapper/0/1 is trying to lock: ffff0000008fed30 (&ctl->lock){....}-{3:3}, at: meson_gpio_irq_update_bits0 other info that might help us debug this: context-{5:5} 3 locks held by swapper/0/1: #0: ffff0000003cd0f8 (&dev->mutex){....}-{4:4}, at: __driver_attach+0x90c #1: ffff000004714650 (&desc->request_mutex){+.+.}-{4:4}, at: __setup_irq0 #2: ffff0000047144c8 (&irq_desc_lock_class){-.-.}-{2:2}, at: __setup_irq0 stack backtrace: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.9.9-sdkernel #1 Call trace: _raw_spin_lock_irqsave+0x60/0x88 meson_gpio_irq_update_bits+0x34/0x70 meson8_gpio_irq_set_type+0x78/0xc4 meson_gpio_irq_set_type+0x30/0x60 __irq_set_trigger+0x60/0x180 __setup_irq+0x30c/0x6e0 request_threaded_irq+0xec/0x1a4 Fixes: 215f4cc0fb20 ("irqchip/meson: Add support for gpio interrupt controller") Signed-off-by: Arseniy Krasnov Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20240729131850.3015508-1-avkrasnov@salutedevices.com Signed-off-by: Sasha Levin --- drivers/irqchip/irq-meson-gpio.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/irqchip/irq-meson-gpio.c b/drivers/irqchip/irq-meson-gpio.c index 89dab14406e69..6a3d18d5ba2f0 100644 --- a/drivers/irqchip/irq-meson-gpio.c +++ b/drivers/irqchip/irq-meson-gpio.c @@ -141,7 +141,7 @@ struct meson_gpio_irq_controller { void __iomem *base; u32 channel_irqs[MAX_NUM_CHANNEL]; DECLARE_BITMAP(channel_map, MAX_NUM_CHANNEL); - spinlock_t lock; + raw_spinlock_t lock; }; static void meson_gpio_irq_update_bits(struct meson_gpio_irq_controller *ctl, @@ -150,14 +150,14 @@ static void meson_gpio_irq_update_bits(struct meson_gpio_irq_controller *ctl, unsigned long flags; u32 tmp; - spin_lock_irqsave(&ctl->lock, flags); + raw_spin_lock_irqsave(&ctl->lock, flags); tmp = readl_relaxed(ctl->base + reg); tmp &= ~mask; tmp |= val; writel_relaxed(tmp, ctl->base + reg); - spin_unlock_irqrestore(&ctl->lock, flags); + raw_spin_unlock_irqrestore(&ctl->lock, flags); } static void meson_gpio_irq_init_dummy(struct meson_gpio_irq_controller *ctl) @@ -207,12 +207,12 @@ meson_gpio_irq_request_channel(struct meson_gpio_irq_controller *ctl, unsigned long flags; unsigned int idx; - spin_lock_irqsave(&ctl->lock, flags); + raw_spin_lock_irqsave(&ctl->lock, flags); /* Find a free channel */ idx = find_first_zero_bit(ctl->channel_map, ctl->params->nr_channels); if (idx >= ctl->params->nr_channels) { - spin_unlock_irqrestore(&ctl->lock, flags); + raw_spin_unlock_irqrestore(&ctl->lock, flags); pr_err("No channel available\n"); return -ENOSPC; } @@ -220,7 +220,7 @@ meson_gpio_irq_request_channel(struct meson_gpio_irq_controller *ctl, /* Mark the channel as used */ set_bit(idx, ctl->channel_map); - spin_unlock_irqrestore(&ctl->lock, flags); + raw_spin_unlock_irqrestore(&ctl->lock, flags); /* * Setup the mux of the channel to route the signal of the pad @@ -488,7 +488,7 @@ static int __init meson_gpio_irq_of_init(struct device_node *node, if (!ctl) return -ENOMEM; - spin_lock_init(&ctl->lock); + raw_spin_lock_init(&ctl->lock); ctl->base = of_iomap(node, 0); if (!ctl->base) { -- 2.43.0