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 E8B072DCF4C; Tue, 16 Jun 2026 18:30:48 +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=1781634650; cv=none; b=I5TGvbjTWLTVz1ZwfbROjtDiAM1LgM0eHwcIKmpCoGS0p7Q8CyGR0PXsC1GokivlJueu601yItdevb8eczYI/sS4TFf8VHbaVvHPTjLcRAwwXwHMI3CITyjlr/QlQAu8jDzyhmnOi8CNx6RQ5GUQi5hEzTICiMTzZ+s/GeP8XnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781634650; c=relaxed/simple; bh=mFSKyY5AJdfL0KEksE8p7o13pZr/8hln66TPdrJU3lA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uHgbWoDS2yEWrC4uoVarPdYpS8rA5ZZCwzctCwsP70A4lEOtnUZ1Gp1b0snCi8oKw5fPravb7NyYHpK7LSNO7T6mHDGsx8BPvSn07MaBWx4PjBA1PTlAflsPO5PWlWFp3pmenmfzYU7ai7EtgUBH0RWXCCRqw28ytIm2q1yKhNI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KBp6MZy4; 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="KBp6MZy4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF83B1F000E9; Tue, 16 Jun 2026 18:30:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781634648; bh=54WJA0T9nn0ox+t9pjEIAPAutbcLIHbiINC4FEIZ5oI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KBp6MZy4hK4mmqr24d74Wy1tj25z/iak0Rk0Y1o0Fiq/RCjVqQib4HUMSJsGIrjMx qHf+aViMqusbp8auJ1tn7mNAr+w6zVUIP2sgVpbnZ0rtuI61XGOexqA+Qp0DeZ571z 9u+8LpFlCZovfBMrRLNwwWIFJ2n1aTaN2NpeV/Ss= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Pritam Manohar Sutar , Selvarasu Ganesan , Thinh Nguyen , Sasha Levin Subject: [PATCH 5.15 306/411] usb: dwc3: Move GUID programming after PHY initialization Date: Tue, 16 Jun 2026 20:29:04 +0530 Message-ID: <20260616145117.421275105@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@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: Selvarasu Ganesan [ Upstream commit aad35f9c926ec220b0742af1ada45666ae667956 ] The Linux Version Code is currently written to the GUID register before PHY initialization. Certain PHY implementations (such as Synopsys eUSB PHY performing link_sw_reset) clear the GUID register to its default value during initialization, causing the kernel version information to be lost. Move the GUID register programming to occur after PHY initialization completes to ensure the Linux version information persists. Fixes: fa0ea13e9f1c ("usb: dwc3: core: write LINUX_VERSION_CODE to our GUID register") Cc: stable Reported-by: Pritam Manohar Sutar Signed-off-by: Selvarasu Ganesan Acked-by: Thinh Nguyen Link: https://patch.msgid.link/20260417063314.2359-1-selvarasu.g@samsung.com Signed-off-by: Greg Kroah-Hartman [ adapted dwc3_writel(dwc, ...) to dwc3_writel(dwc->regs, ...) ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/core.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -978,12 +978,6 @@ static int dwc3_core_init(struct dwc3 *d hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); - /* - * Write Linux Version Code to our GUID register so it's easy to figure - * out which kernel version a bug was found. - */ - dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); - ret = dwc3_phy_setup(dwc); if (ret) goto err0; @@ -1023,6 +1017,12 @@ static int dwc3_core_init(struct dwc3 *d if (ret) goto err1; + /* + * Write Linux Version Code to our GUID register so it's easy to figure + * out which kernel version a bug was found. + */ + dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); + dwc3_core_setup_global_control(dwc); dwc3_core_num_eps(dwc);