From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Date: Thu, 28 Jun 2018 08:49:18 -0400 Subject: [U-Boot] [U-Boot,1/1] dwc2 USB controller hangs with lan78xx In-Reply-To: <1529348166-130059-2-git-send-email-andrew.thomas@oracle.com> References: <1529348166-130059-2-git-send-email-andrew.thomas@oracle.com> Message-ID: <20180628124918.GA18596@bill-the-cat> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Mon, Jun 18, 2018 at 11:56:06AM -0700, Andrew Thomas wrote: > This bug is the combination of dwc2 USB controller and lan78xx > USB ethernet controller, which is the combination in use on > the Raspberry Pi Model 3 B+. > > When the host attempts to receive a packet, but a packet has not > arrived, the lan78xx controller responds by setting BIR > (Bulk-In Empty Response) to NAK. Unfortunately, this hangs > the USB controller and requires the USB controller to > be reset. > > The fix proposed is to have the lan78xx controller respond > by setting BIR to ZLP. > > Signed-off-by: Andrew Thomas > Tested-by: Peter Robinson > Reviewed-by: Alexander Graf Applied to u-boot/master, thanks! -- Tom -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: not available URL: