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 B4C03235358; Sat, 12 Sep 2026 07:29:48 +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=1789198190; cv=none; b=oeWR7Sif8bmmfY6k0DlUx2douM7TP3uKWML5DvIILtGR7gpmlPYFZ1rkkpJPcb1ZiK43zlv4h7Ys9vOXIfymS/ylZLvytRqqr3wDKsrmVsfspxQAqUndBCHKKAFW6uvRohtBDp52NirB+EmTdeAhR0tuvqvGHYHA67Ldi4B+txw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789198190; c=relaxed/simple; bh=u0Ghql24XDvnxzldj1zPP9uYPA+qNmNwEv7ge4OQRcM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t9ZmzaIzhsHClJBWEHraDErxgim9ZjmjI7koELBYXwUbQK2/z7u4BKz5qWeSgINWctbElEat/rgELEdEohMG/vUd3itJKjZeiob9HE0tMDJaCCqyJKDoNL+51fWvucOGsmNW5x4u9Oddkh02PNEP0ECMs/5VsnvGD4qLMRYz7Qk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KWQOeHjE; 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="KWQOeHjE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD0C91F000FF; Sat, 12 Sep 2026 07:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789198187; bh=jTdcncJ45TvCYwO4pEAe91EIa5BNYfYiB4uc3sRqtjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KWQOeHjEXb1jrgreUWooFYaE0mt0ejjIx9/izDsYkuiRh7eADNSuiStb6MhFQ9aPZ ULn8oPhm/CmOeTf9XYR5mO3ZY01i6JCr+GbWv3UT6frv0D5N2ymTtsS8RWK2h1fiK5 OHaNslwmFyYtFmhagrxb4L6nwrNpPG/aYSLwhWvc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fei Shao , Sasha Levin Subject: [PATCH 7.2 0330/1815] usb: mtu3: allow system suspend during active gadget connection Date: Sat, 12 Sep 2026 08:34:40 +0200 Message-ID: <20260912065656.674213323@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065648.999753832@linuxfoundation.org> References: <20260912065648.999753832@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 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fei Shao [ Upstream commit e69027c25361b6044c7928715667586cc5469063 ] When operating in gadget mode connected to a USB host, system suspend fails with -EBUSY because active peripheral connections block suspend entry. Fix this by restricting the -EBUSY check to runtime autosuspend (PMSG_IS_AUTO). For system suspend (!PMSG_IS_AUTO), perform soft disconnect to disconnect from the bus and allow MAC sleep. Fixes: 427c66422e14 ("usb: mtu3: support suspend/resume for device mode") Signed-off-by: Fei Shao Link: https://patch.msgid.link/20260626082218.2750459-2-fshao@chromium.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/mtu3/mtu3_core.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index 66dbfe1705d57..a40bf5bad2d5d 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -1037,9 +1037,14 @@ int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg) if (!mtu->gadget_driver) return 0; - if (mtu->connected) + /* Prevent runtime suspend when active connection exists */ + if (mtu->connected && PMSG_IS_AUTO(msg)) return -EBUSY; + /* Perform soft disconnect for system suspend */ + if (mtu->softconnect && !PMSG_IS_AUTO(msg)) + mtu3_dev_on_off(mtu, 0); + mtu3_dev_suspend(mtu); synchronize_irq(mtu->irq); @@ -1055,5 +1060,9 @@ int ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg) mtu3_dev_resume(mtu); + /* Restore soft connect for system resume */ + if (mtu->softconnect && !PMSG_IS_AUTO(msg)) + mtu3_dev_on_off(mtu, 1); + return 0; } -- 2.53.0