From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Verkuil Subject: Re: [RFC PATCH 2/3] radio-keene: add a driver for the Keene FM Transmitter. Date: Mon, 16 Jan 2012 14:03:07 +0100 Message-ID: <201201161403.07867.hverkuil@xs4all.nl> References: <1326716960-4424-1-git-send-email-hverkuil@xs4all.nl> <955b875452cd4dca966f87d45a31a718637b03c0.1326716517.git.hans.verkuil@cisco.com> <201201161346.46474.oneukum@suse.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Return-path: Received: from ams-iport-2.cisco.com ([144.254.224.141]:18794 "EHLO ams-iport-2.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752569Ab2APNDU (ORCPT ); Mon, 16 Jan 2012 08:03:20 -0500 In-Reply-To: <201201161346.46474.oneukum@suse.de> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Oliver Neukum Cc: linux-media@vger.kernel.org, linux-input@vger.kernel.org, Jiri Kosina , Hans Verkuil On Monday 16 January 2012 13:46:46 Oliver Neukum wrote: > Am Montag, 16. Januar 2012, 13:29:19 schrieb Hans Verkuil: > > +/* check if the device is present and register with v4l and usb if it is > > */ +static int usb_keene_probe(struct usb_interface *intf, > > + const struct usb_device_id *id) > > +{ > > + struct keene_device *radio; > > + struct v4l2_ctrl_handler *hdl; > > + int retval = 0; > > + > > + radio = kzalloc(sizeof(struct keene_device), GFP_KERNEL); > > + > > + if (!radio) { > > + dev_err(&intf->dev, "kmalloc for keene_device failed\n"); > > + retval = -ENOMEM; > > + goto err; > > + } > > Oh, I forgot. You have no guarantee the hid driver is already loaded. > This driver needs to also gracefully handle being called for a HID > device. And how do I do that? Do you have a pointer to another driver for me? Regards, Hans