From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752896AbbGWMKO (ORCPT ); Thu, 23 Jul 2015 08:10:14 -0400 Received: from mga03.intel.com ([134.134.136.65]:23856 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752574AbbGWMJt (ORCPT ); Thu, 23 Jul 2015 08:09:49 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,530,1432623600"; d="scan'208";a="611456766" From: Tomas Winkler To: Greg Kroah-Hartman Cc: arnd@arndb.de, Alexander Usyskin , linux-kernel@vger.kernel.org, Tomas Winkler Subject: [char-misc-next 08/15 V3] mei: bus: revamp probe and remove functions Date: Thu, 23 Jul 2015 15:08:40 +0300 Message-Id: <1437653327-3308-9-git-send-email-tomas.winkler@intel.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1437653327-3308-1-git-send-email-tomas.winkler@intel.com> References: <1437653327-3308-1-git-send-email-tomas.winkler@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of generating device id on the fly during probing we find the matching id entry on the device id table. Get bus the module reference counter so it cannot be unloaded after the driver has bounded to the client device Signed-off-by: Tomas Winkler --- V2: resend V3: rebase drivers/misc/mei/bus.c | 41 ++++++++++++++++++++++++++++++----------- 1 file changed, 30 insertions(+), 11 deletions(-) diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 4955a0908d04..1d9ce9c491cf 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -446,30 +446,49 @@ static int mei_cl_device_match(struct device *dev, struct device_driver *drv) return 0; } +/** + * mei_cl_device_probe - bus probe function + * + * @dev: device + * + * Return: 0 on success; < 0 otherwise + */ static int mei_cl_device_probe(struct device *dev) { - struct mei_cl_device *cldev = to_mei_cl_device(dev); + struct mei_cl_device *cldev; struct mei_cl_driver *cldrv; - struct mei_cl_device_id id; + const struct mei_cl_device_id *id; + + cldev = to_mei_cl_device(dev); + cldrv = to_mei_cl_driver(dev->driver); if (!cldev) return 0; - cldrv = to_mei_cl_driver(dev->driver); if (!cldrv || !cldrv->probe) return -ENODEV; - dev_dbg(dev, "Device probe\n"); + id = mei_cl_device_find(cldev, cldrv); + if (!id) + return -ENODEV; - strlcpy(id.name, cldev->name, sizeof(id.name)); + __module_get(THIS_MODULE); - return cldrv->probe(cldev, &id); + return cldrv->probe(cldev, id); } +/** + * mei_cl_device_remove - remove device from the bus + * + * @dev: device + * + * Return: 0 on success; < 0 otherwise + */ static int mei_cl_device_remove(struct device *dev) { struct mei_cl_device *cldev = to_mei_cl_device(dev); struct mei_cl_driver *cldrv; + int ret = 0; if (!cldev || !dev->driver) return 0; @@ -480,13 +499,13 @@ static int mei_cl_device_remove(struct device *dev) } cldrv = to_mei_cl_driver(dev->driver); - if (!cldrv->remove) { - dev->driver = NULL; + if (cldrv->remove) + ret = cldrv->remove(cldev); - return 0; - } + module_put(THIS_MODULE); + dev->driver = NULL; + return ret; - return cldrv->remove(cldev); } static ssize_t name_show(struct device *dev, struct device_attribute *a, -- 2.4.3