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 9BA621F7562; Tue, 17 Dec 2024 17:13:04 +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=1734455584; cv=none; b=L7Q4+wA0P6Z01iTv/BSJN9+94CaNSrsO/xNg59fHIOy4vkUA6KHKHD6uAA/6rJ0wZH+HCK9pWsiTqUDyJAcZP3F7++lD2CxScNbLuSuwx9tZaltyDWOD7cmSca2v8UyKz8AzUMWvKUvZq5EwLs+Xl+32CJ/IbtbPC5oJRcRafYk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734455584; c=relaxed/simple; bh=ppC7ZetOXmp4dL7H52DgpTxV4nlgVfJNS4QjKgO2QMY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X99Q2EeHJ4cHo2qE5DMJfE6WBdOp6U38J/nyLzLbOE8jeojpQVHQK/cwWWT0C2XkhVtiNgL14GqkkZW+KILglhc4oyIrNd1peynV8qqlfWZF0FcZqLbH8ejt2zY/gAO4cwyfUSM6tOgpfmeOHIOmQLd+NfOyo0zdu9KtWA4pnBQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0FG8BAxQ; 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="0FG8BAxQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 17F1EC4CED3; Tue, 17 Dec 2024 17:13:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734455584; bh=ppC7ZetOXmp4dL7H52DgpTxV4nlgVfJNS4QjKgO2QMY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0FG8BAxQggOpIy4AKmUZisUm0TcAkWdYe/p5pNmK8fXFWxhdIYeYZ5sWiRDfZqOlz sVpenuUcTDS72HC65LB7umgcmSEFnSaeh3wgIKBg8yqR+qDUYx9EiQu7/XuyaVzgbG jurNXorE/i0a0QPJ7exUJvykJSfkwWDrKDLL0Qus= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefan Wahren Subject: [PATCH 5.15 05/51] usb: dwc2: Fix HCD resume Date: Tue, 17 Dec 2024 18:06:58 +0100 Message-ID: <20241217170520.527931860@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241217170520.301972474@linuxfoundation.org> References: <20241217170520.301972474@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: Stefan Wahren commit 336f72d3cbf5cc17df2947bbbd2ba6e2509f17e8 upstream. The Raspberry Pi can suffer on interrupt storms on HCD resume. The dwc2 driver sometimes misses to enable HCD_FLAG_HW_ACCESSIBLE before re-enabling the interrupts. This causes a situation where both handler ignore a incoming port interrupt and force the upper layers to disable the dwc2 interrupt line. This leaves the USB interface in a unusable state: irq 66: nobody cared (try booting with the "irqpoll" option) CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.10.0-rc3 Hardware name: BCM2835 Call trace: unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x50/0x64 dump_stack_lvl from __report_bad_irq+0x38/0xc0 __report_bad_irq from note_interrupt+0x2ac/0x2f4 note_interrupt from handle_irq_event+0x88/0x8c handle_irq_event from handle_level_irq+0xb4/0x1ac handle_level_irq from generic_handle_domain_irq+0x24/0x34 generic_handle_domain_irq from bcm2836_chained_handle_irq+0x24/0x28 bcm2836_chained_handle_irq from generic_handle_domain_irq+0x24/0x34 generic_handle_domain_irq from generic_handle_arch_irq+0x34/0x44 generic_handle_arch_irq from __irq_svc+0x88/0xb0 Exception stack(0xc1b01f20 to 0xc1b01f68) 1f20: 0005c0d4 00000001 00000000 00000000 c1b09780 c1d6b32c c1b04e54 c1a5eae8 1f40: c1b04e90 00000000 00000000 00000000 c1d6a8a0 c1b01f70 c11d2da8 c11d4160 1f60: 60000013 ffffffff __irq_svc from default_idle_call+0x1c/0xb0 default_idle_call from do_idle+0x21c/0x284 do_idle from cpu_startup_entry+0x28/0x2c cpu_startup_entry from kernel_init+0x0/0x12c handlers: [] dwc2_handle_common_intr [<75cd278b>] usb_hcd_irq Disabling IRQ #66 So enable the HCD_FLAG_HW_ACCESSIBLE flag in case there is a port connection. Fixes: c74c26f6e398 ("usb: dwc2: Fix partial power down exiting by system resume") Closes: https://lore.kernel.org/linux-usb/3fd0c2fb-4752-45b3-94eb-42352703e1fd@gmx.net/T/ Link: https://lore.kernel.org/all/5e8cbce0-3260-2971-484f-fc73a3b2bd28@synopsys.com/ Signed-off-by: Stefan Wahren Link: https://lore.kernel.org/r/20241202001631.75473-2-wahrenst@gmx.net Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc2/hcd.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4464,6 +4464,7 @@ static int _dwc2_hcd_resume(struct usb_h * Power Down mode. */ if (hprt0 & HPRT0_CONNSTS) { + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); hsotg->lx_state = DWC2_L0; goto unlock; }