From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Hovold Subject: Re: [PATCH 2/6] mfd: rtsx_usb: fix platform device-id collision Date: Tue, 7 Oct 2014 14:52:58 +0200 Message-ID: <20141007125258.GE5362@localhost> References: <1411728933-13351-1-git-send-email-johan@kernel.org> <1411728933-13351-3-git-send-email-johan@kernel.org> <20141007092258.GR25331@lee--X1> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20141007092258.GR25331@lee--X1> Sender: linux-kernel-owner@vger.kernel.org To: Lee Jones Cc: Johan Hovold , Samuel Ortiz , Jiri Kosina , linux-input@vger.kernel.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org List-Id: linux-input@vger.kernel.org On Tue, Oct 07, 2014 at 10:22:58AM +0100, Lee Jones wrote: > On Fri, 26 Sep 2014, Johan Hovold wrote: > > > Hot-pluggable multi-function devices should use PLATFORM_DEVID_AUTO to > > avoid name collisions on the platform bus. > > > > This driver currently uses the USB-device address as an id. This makes > > name collisions unlikely, but it could still happen if two devices are > > connected to separate buses and gets assigned the same address. > > > > Signed-off-by: Johan Hovold > > --- > > drivers/mfd/rtsx_usb.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > This patch is superfluous. Well, it would have documented the fact that there could be probe failures due to id collisions with current and older kernels. > Just wait until the hotpluggable version is applied, then use it. Fine with me. The collisions are quite unlikely anyway. Thanks, Johan > > diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c > > index 71f387ce8cbd..78073e4b87e4 100644 > > --- a/drivers/mfd/rtsx_usb.c > > +++ b/drivers/mfd/rtsx_usb.c > > @@ -647,7 +647,7 @@ static int rtsx_usb_probe(struct usb_interface *intf, > > /* initialize USB SG transfer timer */ > > setup_timer(&ucr->sg_timer, rtsx_usb_sg_timed_out, (unsigned long) ucr); > > > > - ret = mfd_add_devices(&intf->dev, usb_dev->devnum, rtsx_usb_cells, > > + ret = mfd_add_devices(&intf->dev, PLATFORM_DEVID_AUTO, rtsx_usb_cells, > > ARRAY_SIZE(rtsx_usb_cells), NULL, 0, NULL); > > if (ret) > > goto out_init_fail;