From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030206Ab3BFUFm (ORCPT ); Wed, 6 Feb 2013 15:05:42 -0500 Received: from mail-ob0-f174.google.com ([209.85.214.174]:37795 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030177Ab3BFTuL (ORCPT ); Wed, 6 Feb 2013 14:50:11 -0500 From: Tejun Heo To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, Tejun Heo , linux1394-devel@lists.sourceforge.net Subject: [PATCH 29/77] firewire: convert to idr_alloc() Date: Wed, 6 Feb 2013 11:40:01 -0800 Message-Id: <1360179649-22465-30-git-send-email-tj@kernel.org> X-Mailer: git-send-email 1.8.1 In-Reply-To: <1360179649-22465-1-git-send-email-tj@kernel.org> References: <1360179649-22465-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Convert to the much saner new idr interface. Only compile tested. v2: Stefan pointed out that add_client_resource() may be called from non-process context. Preload iff @gfp_mask contains __GFP_WAIT. Also updated to include minor upper limit check. Signed-off-by: Tejun Heo Acked-by: Stefan Richter Cc: linux1394-devel@lists.sourceforge.net --- drivers/firewire/core-cdev.c | 19 ++++++++++--------- drivers/firewire/core-device.c | 8 +------- 2 files changed, 11 insertions(+), 16 deletions(-) diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 68c3138..27ac423 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -487,27 +487,28 @@ static int ioctl_get_info(struct client *client, union ioctl_arg *arg) static int add_client_resource(struct client *client, struct client_resource *resource, gfp_t gfp_mask) { + bool preload = gfp_mask & __GFP_WAIT; unsigned long flags; int ret; - retry: - if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) - return -ENOMEM; - + if (preload) + idr_preload(gfp_mask); spin_lock_irqsave(&client->lock, flags); + if (client->in_shutdown) ret = -ECANCELED; else - ret = idr_get_new(&client->resource_idr, resource, - &resource->handle); + ret = idr_alloc(&client->resource_idr, resource, 0, 0, + GFP_NOWAIT); if (ret >= 0) { + resource->handle = ret; client_get(client); schedule_if_iso_resource(resource); } - spin_unlock_irqrestore(&client->lock, flags); - if (ret == -EAGAIN) - goto retry; + spin_unlock_irqrestore(&client->lock, flags); + if (preload) + idr_preload_end(); return ret < 0 ? ret : 0; } diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index af3e8aa..b946330 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -1017,13 +1017,7 @@ static void fw_device_init(struct work_struct *work) fw_device_get(device); down_write(&fw_device_rwsem); - ret = idr_pre_get(&fw_device_idr, GFP_KERNEL) ? - idr_get_new(&fw_device_idr, device, &minor) : - -ENOMEM; - if (minor >= 1 << MINORBITS) { - idr_remove(&fw_device_idr, minor); - minor = -ENOSPC; - } + ret = idr_alloc(&fw_device_idr, device, 0, 1 << MINORBITS, GFP_KERNEL); up_write(&fw_device_rwsem); if (ret < 0) -- 1.8.1