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 56AAE2EEE60; Sat, 12 Sep 2026 17:10:04 +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=1789233005; cv=none; b=p+dlH7Onv6j9WHC3a3DTJKgjhu1UrfgN9PEw7h8QDilKyCTfdRT0JMIpaEHaKR2yvOj0bHtqTES55XC97k50oW+7VFTfZrWlP+Y2OxgpggkvxRDspJlTbof2QuZX+9taqi2PzOhKuubBVGpZxZZngY2PaqcF7J+PvMis2wrtc24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789233005; c=relaxed/simple; bh=WmzDoe/rs1DpfwkCXK7qeO79eMAgBPsCzIRz9GQ+3DE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WDZQ6BnbUPFRwCimS/r7JxZOgyra/NUtcoIWkuQaYTF0+VJ0JYBfNzNrawwbRb9AWRvNJDY4ijAdbuu91DkMcUDuz284PPgwN2FE84hRjMfbbB21EgL/lsh1Eub1zjllxe7Gnl6NIcN4GMT4VEmIS2G7FhMTPiryJmTf2/kzA/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CKSAuJ4/; 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="CKSAuJ4/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D590C1F000FF; Sat, 12 Sep 2026 17:10:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789233003; bh=xljcgCr+IERLlckJlIhqeXf1mJ3FozHFKFTdxa7prNQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CKSAuJ4/eSiaYZPc84a6niUfeiu88JE2NxZFcj2BbNutwtKnoeJetwYu7c5EOmlUT V0AFXdkXq+YWYlOrtxnQGMJt/PTCn8a14ImcV30D3iKj0amyIflpYDVAICKZ0QD7td 2kuUjerhGbzQ66kJ6aV47cI+OitKsSHmNmkJ6qFI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matt Turner , Magnus Lindholm Subject: [PATCH 5.15 083/935] alpha: marvel: Fix lock ordering in init_io7_irqs() Date: Sat, 12 Sep 2026 08:51:53 +0200 Message-ID: <20260912065528.732310794@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Matt Turner commit 24d68db713d63dfe3660c56b50e887784844baea upstream. Move irq_set_chip_and_handler() and irq_set_status_flags() calls outside the io7->irq_lock raw spinlock. These functions take sparse_irq_lock, which is a mutex, and taking a sleeping lock while holding a raw spinlock is invalid. The raw spinlock only needs to protect the hardware CSR accesses. This fixes the following lockdep splat during boot: [ BUG: Invalid wait context ] swapper/0/0 is trying to lock: sparse_irq_lock{....}-{4:4}, at: irq_mark_irq other info that might help us debug this: context-{5:5} 1 lock held by swapper/0/0: #0: &io7->irq_lock{....}-{2:2}, at: init_io7_irqs.constprop.0 Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Matt Turner Reviewed-by: Magnus Lindholm Link: https://lore.kernel.org/r/20260528230516.1839694-2-mattst88@gmail.com Signed-off-by: Magnus Lindholm Signed-off-by: Greg Kroah-Hartman --- arch/alpha/kernel/sys_marvel.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) --- a/arch/alpha/kernel/sys_marvel.c +++ b/arch/alpha/kernel/sys_marvel.c @@ -263,6 +263,18 @@ init_io7_irqs(struct io7 *io7, */ printk(" Interrupts reported to CPU at PE %u\n", boot_cpuid); + /* Set up the lsi irqs. */ + for (i = 0; i < 128; ++i) { + irq_set_chip_and_handler(base + i, lsi_ops, handle_level_irq); + irq_set_status_flags(base + i, IRQ_LEVEL); + } + + /* Set up the msi irqs. */ + for (i = 128; i < (128 + 512); ++i) { + irq_set_chip_and_handler(base + i, msi_ops, handle_level_irq); + irq_set_status_flags(base + i, IRQ_LEVEL); + } + raw_spin_lock(&io7->irq_lock); /* set up the error irqs */ @@ -272,12 +284,6 @@ init_io7_irqs(struct io7 *io7, io7_redirect_irq(io7, &io7->csrs->STV_CTL.csr, boot_cpuid); io7_redirect_irq(io7, &io7->csrs->HEI_CTL.csr, boot_cpuid); - /* Set up the lsi irqs. */ - for (i = 0; i < 128; ++i) { - irq_set_chip_and_handler(base + i, lsi_ops, handle_level_irq); - irq_set_status_flags(base + i, IRQ_LEVEL); - } - /* Disable the implemented irqs in hardware. */ for (i = 0; i < 0x60; ++i) init_one_io7_lsi(io7, i, boot_cpuid); @@ -285,13 +291,6 @@ init_io7_irqs(struct io7 *io7, init_one_io7_lsi(io7, 0x74, boot_cpuid); init_one_io7_lsi(io7, 0x75, boot_cpuid); - - /* Set up the msi irqs. */ - for (i = 128; i < (128 + 512); ++i) { - irq_set_chip_and_handler(base + i, msi_ops, handle_level_irq); - irq_set_status_flags(base + i, IRQ_LEVEL); - } - for (i = 0; i < 16; ++i) init_one_io7_msi(io7, i, boot_cpuid);