From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF423C433FE for ; Wed, 4 May 2022 17:09:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351287AbiEDRMx (ORCPT ); Wed, 4 May 2022 13:12:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356843AbiEDRJp (ORCPT ); Wed, 4 May 2022 13:09:45 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44E2640A1E; Wed, 4 May 2022 09:55:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CF1A0616F8; Wed, 4 May 2022 16:55:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2AD10C385AA; Wed, 4 May 2022 16:55:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651683356; bh=GYqdHF/kWbxCt6a86UWjM3QOO2fhmQgGD64+8+8qvrI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wxndevaQjYAPC7wPE/YFoReh99w4A/be34cHyIlXkMvmmjXL8VuEOPehFaJMb9g/K 4b7VePrOMKn18dsdAM3RHtxuRqR5QnAd1AoLwQMYhapNOpIn+m/D+Bv13zpJ3TVuvn UnwvCDQoU0aVOdrYv+4ajSUiLKt3QbMMuyFCtpe0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Chen , Pawel Laszczak Subject: [PATCH 5.17 029/225] usb: cdns3: Fix issue for clear halt endpoint Date: Wed, 4 May 2022 18:44:27 +0200 Message-Id: <20220504153112.887225733@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220504153110.096069935@linuxfoundation.org> References: <20220504153110.096069935@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Pawel Laszczak commit b3fa25de31fb7e9afebe9599b8ff32eda13d7c94 upstream. Path fixes bug which occurs during resetting endpoint in __cdns3_gadget_ep_clear_halt function. During resetting endpoint controller will change HW/DMA owned TRB. It set Abort flag in trb->control and will change trb->length field. If driver want to use the aborted trb it must update the changed field in TRB. Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") cc: Acked-by: Peter Chen Signed-off-by: Pawel Laszczak Link: https://lore.kernel.org/r/20220329084605.4022-1-pawell@cadence.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/cdns3/cdns3-gadget.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2684,6 +2684,7 @@ int __cdns3_gadget_ep_clear_halt(struct struct usb_request *request; struct cdns3_request *priv_req; struct cdns3_trb *trb = NULL; + struct cdns3_trb trb_tmp; int ret; int val; @@ -2693,8 +2694,10 @@ int __cdns3_gadget_ep_clear_halt(struct if (request) { priv_req = to_cdns3_request(request); trb = priv_req->trb; - if (trb) + if (trb) { + trb_tmp = *trb; trb->control = trb->control ^ cpu_to_le32(TRB_CYCLE); + } } writel(EP_CMD_CSTALL | EP_CMD_EPRST, &priv_dev->regs->ep_cmd); @@ -2709,7 +2712,7 @@ int __cdns3_gadget_ep_clear_halt(struct if (request) { if (trb) - trb->control = trb->control ^ cpu_to_le32(TRB_CYCLE); + *trb = trb_tmp; cdns3_rearm_transfer(priv_ep, 1); }