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 0FAF61DED5B; Fri, 4 Oct 2024 18:29:38 +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=1728066579; cv=none; b=Mf9mMceD5Fm6ex8p8lyElXaG2od8jFppEgtt+w4P6+vfpRcTHEUA4FggeZeaSVSuEYatVxSWOQHVA/ijkhVgJ/0ds4rn+Ml9ZqymWX6FNYZrQvXtEK0YlTGBBPSbT+eG/z300r4Z8hgfg+DmtUlcElK5M+LY50XNjGH0UtsiGxs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066579; c=relaxed/simple; bh=VMgOIpWROpYFGhZMsoDwdLMNW2lUgcviDZLiEj0Bfso=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WNsySeous5vmzSxaQQ8GCZjVqMfohUu5RIrKPQRCJLdi0hFM1fM1nd0m90/WZtDfPqCXI1C0L8vD7e0dJX8yP/HUWLYmozA3rZfU79R2hxajPZac1k8l7h+6UwgFxTxWgWbPcWeDJFDix1TCmJEFlai5JEzkKx+8I2z8oVkAS5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eZy7vPQG; 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="eZy7vPQG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0103C4CEC6; Fri, 4 Oct 2024 18:29:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728066578; bh=VMgOIpWROpYFGhZMsoDwdLMNW2lUgcviDZLiEj0Bfso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eZy7vPQGDSAhYLAjnW1tD5B2aCjMowYww5c8ttJngswa4ZW84PiIEOWGG8Nu5/POP b0PJFknFEgQ7fzxBoNc8oS2QTAoSrHC+qL452SWcGqJD9nhjc3hhrWlRZmWSmmTlQM 2FZQYMlQZIlIWqScKFNq2tlsBouCjNy5feFi+dOOy4NiEsZzMahDEuziUhhAqTGls/ 3AL6o6sg8GwvlsUqn6ohIl4dtxm5Fxs0Zdet4mshBh7DuORWMqw+EFuUEIvOM3uc8i WtO4EgGQpjFKo9HU3vSnjzBKH9ajtCZ9MtTZDrUDXSonjf+URwBBmlCtd2ZV8yUJZ5 5ReZiB6b6SCUw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Shawn Shao , Greg Kroah-Hartman , Sasha Levin , hminas@synopsys.com, linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 25/31] usb: dwc2: Adjust the timing of USB Driver Interrupt Registration in the Crashkernel Scenario Date: Fri, 4 Oct 2024 14:28:33 -0400 Message-ID: <20241004182854.3674661-25-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241004182854.3674661-1-sashal@kernel.org> References: <20241004182854.3674661-1-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 5.15.167 Content-Transfer-Encoding: 8bit From: Shawn Shao [ Upstream commit 4058c39bd176daf11a826802d940d86292a6b02b ] The issue is that before entering the crash kernel, the DWC USB controller did not perform operations such as resetting the interrupt mask bits. After entering the crash kernel,before the USB interrupt handler registration was completed while loading the DWC USB driver,an GINTSTS_SOF interrupt was received.This triggered the misroute_irq process within the GIC handling framework,ultimately leading to the misrouting of the interrupt,causing it to be handled by the wrong interrupt handler and resulting in the issue. Summary:In a scenario where the kernel triggers a panic and enters the crash kernel,it is necessary to ensure that the interrupt mask bit is not enabled before the interrupt registration is complete. If an interrupt reaches the CPU at this moment,it will certainly not be handled correctly,especially in cases where this interrupt is reported frequently. Please refer to the Crashkernel dmesg information as follows (the message on line 3 was added before devm_request_irq is called by the dwc2_driver_probe function): [ 5.866837][ T1] dwc2 JMIC0010:01: supply vusb_d not found, using dummy regulator [ 5.874588][ T1] dwc2 JMIC0010:01: supply vusb_a not found, using dummy regulator [ 5.882335][ T1] dwc2 JMIC0010:01: before devm_request_irq irq: [71], gintmsk[0xf300080e], gintsts[0x04200009] [ 5.892686][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.0-jmnd1.2_RC #18 [ 5.900327][ C0] Hardware name: CMSS HyperCard4-25G/HyperCard4-25G, BIOS 1.6.4 Jul 8 2024 [ 5.908836][ C0] Call trace: [ 5.911965][ C0] dump_backtrace+0x0/0x1f0 [ 5.916308][ C0] show_stack+0x20/0x30 [ 5.920304][ C0] dump_stack+0xd8/0x140 [ 5.924387][ C0] pcie_xxx_handler+0x3c/0x1d8 [ 5.930121][ C0] __handle_irq_event_percpu+0x64/0x1e0 [ 5.935506][ C0] handle_irq_event+0x80/0x1d0 [ 5.940109][ C0] try_one_irq+0x138/0x174 [ 5.944365][ C0] misrouted_irq+0x134/0x140 [ 5.948795][ C0] note_interrupt+0x1d0/0x30c [ 5.953311][ C0] handle_irq_event+0x13c/0x1d0 [ 5.958001][ C0] handle_fasteoi_irq+0xd4/0x260 [ 5.962779][ C0] __handle_domain_irq+0x88/0xf0 [ 5.967555][ C0] gic_handle_irq+0x9c/0x2f0 [ 5.971985][ C0] el1_irq+0xb8/0x140 [ 5.975807][ C0] __setup_irq+0x3dc/0x7cc [ 5.980064][ C0] request_threaded_irq+0xf4/0x1b4 [ 5.985015][ C0] devm_request_threaded_irq+0x80/0x100 [ 5.990400][ C0] dwc2_driver_probe+0x1b8/0x6b0 [ 5.995178][ C0] platform_drv_probe+0x5c/0xb0 [ 5.999868][ C0] really_probe+0xf8/0x51c [ 6.004125][ C0] driver_probe_device+0xfc/0x170 [ 6.008989][ C0] device_driver_attach+0xc8/0xd0 [ 6.013853][ C0] __driver_attach+0xe8/0x1b0 [ 6.018369][ C0] bus_for_each_dev+0x7c/0xdc [ 6.022886][ C0] driver_attach+0x2c/0x3c [ 6.027143][ C0] bus_add_driver+0xdc/0x240 [ 6.031573][ C0] driver_register+0x80/0x13c [ 6.036090][ C0] __platform_driver_register+0x50/0x5c [ 6.041476][ C0] dwc2_platform_driver_init+0x24/0x30 [ 6.046774][ C0] do_one_initcall+0x50/0x25c [ 6.051291][ C0] do_initcall_level+0xe4/0xfc [ 6.055894][ C0] do_initcalls+0x80/0xa4 [ 6.060064][ C0] kernel_init_freeable+0x198/0x240 [ 6.065102][ C0] kernel_init+0x1c/0x12c Signed-off-by: Shawn Shao Link: https://lore.kernel.org/r/20240830031709.134-1-shawn.shao@jaguarmicro.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/dwc2/platform.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 79094384d8fd4..5ff8186936790 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -484,18 +484,6 @@ static int dwc2_driver_probe(struct platform_device *dev) spin_lock_init(&hsotg->lock); - hsotg->irq = platform_get_irq(dev, 0); - if (hsotg->irq < 0) - return hsotg->irq; - - dev_dbg(hsotg->dev, "registering common handler for irq%d\n", - hsotg->irq); - retval = devm_request_irq(hsotg->dev, hsotg->irq, - dwc2_handle_common_intr, IRQF_SHARED, - dev_name(hsotg->dev), hsotg); - if (retval) - return retval; - hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); if (IS_ERR(hsotg->vbus_supply)) { retval = PTR_ERR(hsotg->vbus_supply); @@ -539,6 +527,20 @@ static int dwc2_driver_probe(struct platform_device *dev) if (retval) goto error; + hsotg->irq = platform_get_irq(dev, 0); + if (hsotg->irq < 0) { + retval = hsotg->irq; + goto error; + } + + dev_dbg(hsotg->dev, "registering common handler for irq%d\n", + hsotg->irq); + retval = devm_request_irq(hsotg->dev, hsotg->irq, + dwc2_handle_common_intr, IRQF_SHARED, + dev_name(hsotg->dev), hsotg); + if (retval) + goto error; + /* * For OTG cores, set the force mode bits to reflect the value * of dr_mode. Force mode bits should not be touched at any -- 2.43.0