From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 25 Nov 2021 08:46:59 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mq9T9-0005MD-Bx for lore@lore.pengutronix.de; Thu, 25 Nov 2021 08:46:59 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mq9T8-0006ns-Gi for lore@pengutronix.de; Thu, 25 Nov 2021 08:46:59 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:From:In-Reply-To:MIME-Version: References:Message-ID:Subject:Cc:To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ytNT7OpL6Zjh8U1iQ2VD0Zdbq+HoAyx0jdfBFKNfWPA=; b=McgasEuzYWXTBMSGi6GUEPGz1J QWVWX72+gyiJOUBKhScdNyoegr40fWyb/suVdboCyWpm7R/AQOSj+L3NmDjY13UuiLBXQSgLDSfUk +ix+Pjaj2dAaBlyIwOBsfXP5qKL5fIedvq9VtUNpGSJ9eU4Xg8J725GU0APqt0l07zSV9Zjpo5CDt v8tIXzENtqfk9Q0Ce1v9XrKRrJP4vI7+XEeKSN3GZ/+dwTuqX3TQNm3xveuabA0LJjxjApGluFZGW fJPX+WOjgzIVSNz7iD94MmQFqHNtw+fJOKUAYawXFYhqMb2v7DCo+JNo5bYoKgvn390eNTQaykEd1 +c+IM/Vg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mq9S1-006cTy-28; Thu, 25 Nov 2021 07:45:49 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mq9Rv-006cT0-44 for barebox@lists.infradead.org; Thu, 25 Nov 2021 07:45:44 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mq9Rt-0006UN-V2; Thu, 25 Nov 2021 08:45:41 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mq9Rt-0007Zd-9d; Thu, 25 Nov 2021 08:45:41 +0100 Date: Thu, 25 Nov 2021 08:45:41 +0100 To: Jules Maselbas Cc: barebox@lists.infradead.org Message-ID: <20211125074541.GB28260@pengutronix.de> References: <20211122173123.17252-1-jmaselbas@kalray.eu> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211122173123.17252-1-jmaselbas@kalray.eu> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 08:45:25 up 280 days, 11:09, 136 users, load average: 0.38, 0.21, 0.19 User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211124_234543_185599_41A031B1 X-CRM114-Status: GOOD ( 19.71 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH] usb: dwc2: host: Do not map buffer on zero len packet X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On Mon, Nov 22, 2021 at 06:31:23PM +0100, Jules Maselbas wrote: > The transfer_chunk can be called for zero length packet, in such case > the buffer pointer is NULL and can fail to be mapped for the device. > > In such case the device DMA address can be directly set to 0, as the > buffer address should be NULL anyway, without calling map/unmap at all. > > Signed-off-by: Jules Maselbas > --- > drivers/usb/dwc2/host.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) Applied to master, thanks Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox