From patchwork Mon Oct 2 06:42:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 13405565 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 0D96C10E8 for ; Mon, 2 Oct 2023 06:42:37 +0000 (UTC) Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 899949B for ; Sun, 1 Oct 2023 23:42:35 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qnCdW-0004ba-22; Mon, 02 Oct 2023 08:42:34 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qnCdU-00ASh9-Qa; Mon, 02 Oct 2023 08:42:32 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1qnCdU-009nt2-2S; Mon, 02 Oct 2023 08:42:32 +0200 From: Michael Grzeschik To: laurent.pinchart@ideasonboard.com Cc: linux-usb@vger.kernel.org, linux-media@vger.kernel.org, gregkh@linuxfoundation.org, john@keeping.me.uk, alsi@bang-olufsen.dk, ruslan.bilovol@gmail.com, kernel@pengutronix.de Subject: [PATCH] usb: gadget: u_audio: initialize spinlocks Date: Mon, 2 Oct 2023 08:42:31 +0200 Message-Id: <20231002064231.2336627-1-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net When using uac2 with lockdep enabled, the kernel is throwing this message, due to uninitialized spinlocks. We initialize them now. [ 24.668867] The code is fine but needs lockdep annotation, or maybe [ 24.675878] you didn't initialize this object before use? [ 24.681910] turning off the locking correctness validator. [ 24.688038] CPU: 0 PID: 348 Comm: irq/43-dwc3 Tainted: G C 6.5.0-20230919-1+ #14 [ 24.697866] Hardware name: WolfVision PF5 (DT) [ 24.702831] Call trace: [ 24.705559] dump_backtrace+0xac/0x130 [ 24.709755] show_stack+0x30/0x48 [ 24.713456] dump_stack_lvl+0x60/0xb0 [ 24.717552] dump_stack+0x18/0x28 [ 24.721254] register_lock_class+0x4e8/0x4f8 [ 24.726029] __lock_acquire+0x88/0x2130 [ 24.730314] lock_acquire+0x17c/0x338 [ 24.734403] _raw_spin_lock_irqsave+0x60/0x90 [ 24.739274] u_audio_get_capture_srate+0x34/0x68 [ 24.744436] afunc_setup+0x2d8/0x538 [ 24.748431] composite_setup+0x1a8/0x1ba8 [ 24.752913] configfs_composite_setup+0x88/0xc0 [ 24.757974] dwc3_ep0_interrupt+0x5e8/0xab8 [ 24.762648] dwc3_process_event_buf+0x424/0xbb0 [ 24.767717] dwc3_thread_interrupt+0x4c/0x90 [ 24.772488] irq_thread_fn+0x34/0xb8 [ 24.776484] irq_thread+0x1a0/0x290 [ 24.780379] kthread+0x10c/0x120 [ 24.783985] ret_from_fork+0x10/0x20 Signed-off-by: Michael Grzeschik --- drivers/usb/gadget/function/u_audio.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c index 4a42574b4a7feb..9d9f906adf7c00 100644 --- a/drivers/usb/gadget/function/u_audio.c +++ b/drivers/usb/gadget/function/u_audio.c @@ -1172,6 +1172,9 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name, g_audio->uac = uac; uac->audio_dev = g_audio; + spin_lock_init(&uac->c_prm.lock); + spin_lock_init(&uac->p_prm.lock); + params = &g_audio->params; p_chmask = params->p_chmask; c_chmask = params->c_chmask;