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 5B2C423373D; Mon, 24 Feb 2025 14:41:10 +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=1740408070; cv=none; b=Zhr6BtmgIIvDyl/36e7/FMA1V3a3U7oSnCVKoZTrd5jHbslQl6DkVDnxjX2tdvVyPts2R9vAITjDvy864/DUsGzcluOun9CY40H3DMaQIMavE8qDNMwNzQfLgHNlcGO5/O6IrEJEv7otlq3M8tI+EF4syPh0zGGsTqbJ4/rRkqY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740408070; c=relaxed/simple; bh=NVx+bldAiOtVgFwnRI6FvAgbDYH6VCYtV7SCtvJHiW4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mMUfoCTi5KoPUJ2l+/J/XIkuPL7jANKDJuSy3fHh+wrWF+/j+ICQtPzmQv6YkxYaarezCKxt+QPiFH/j7visAwEcfo0Q2TJcbM0dPFx+AacwTcAprdCJbok4MtP2TSaDeCMLDOTbJNs7DulZOlDhlcHXv/jsUALs9hT1lnsmWgA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wsGfmXaq; 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="wsGfmXaq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD6A7C4CED6; Mon, 24 Feb 2025 14:41:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740408070; bh=NVx+bldAiOtVgFwnRI6FvAgbDYH6VCYtV7SCtvJHiW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wsGfmXaqKP0a9RMhdgz4woxSt9dEAE/Qas42OMu7UdIM0PwXvkpfDmJRCK94q8FbK 2K++tdGgsWFhbJBZzUrihxPMXW/J7PC3cjhtQJJMEmvbD5iIeHg0ObWD4dLh7fH9mf bQyg8jIg/6ku9AkaSU04RFpJ4prhXZ2CWCVLhZ60= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Jill Donahue , Sasha Levin Subject: [PATCH 6.6 064/140] USB: gadget: f_midi: f_midi_complete to call queue_work Date: Mon, 24 Feb 2025 15:34:23 +0100 Message-ID: <20250224142605.529123307@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250224142602.998423469@linuxfoundation.org> References: <20250224142602.998423469@linuxfoundation.org> User-Agent: quilt/0.68 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jill Donahue [ Upstream commit 4ab37fcb42832cdd3e9d5e50653285ca84d6686f ] When using USB MIDI, a lock is attempted to be acquired twice through a re-entrant call to f_midi_transmit, causing a deadlock. Fix it by using queue_work() to schedule the inner f_midi_transmit() via a high priority work queue from the completion handler. Link: https://lore.kernel.org/all/CAArt=LjxU0fUZOj06X+5tkeGT+6RbXzpWg1h4t4Fwa_KGVAX6g@mail.gmail.com/ Fixes: d5daf49b58661 ("USB: gadget: midi: add midi function driver") Cc: stable Signed-off-by: Jill Donahue Link: https://lore.kernel.org/r/20250211174805.1369265-1-jdonahue@fender.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/gadget/function/f_midi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 49946af11a905..6d91d7d7a23f8 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -282,7 +282,7 @@ f_midi_complete(struct usb_ep *ep, struct usb_request *req) /* Our transmit completed. See if there's more to go. * f_midi_transmit eats req, don't queue it again. */ req->length = 0; - f_midi_transmit(midi); + queue_work(system_highpri_wq, &midi->work); return; } break; -- 2.39.5