From patchwork Fri Jul 22 16:41:23 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [5/8] drm/vmwgfx: use ida_simple_get for id allocation. Date: Fri, 22 Jul 2011 06:41:23 -0000 From: Jonathan Cameron X-Patchwork-Id: 106344 Message-Id: <1311352886-4047-15-git-send-email-jic23@cam.ac.uk> To: linux-kernel@vger.kernel.org Cc: lm-sensors@lm-sensors.org, rtc-linux@googlegroups.com, osd-dev@open-osd.org, linux-scsi@vger.kernel.org, dri-devel@lists.freedesktop.org, jkosina@suse.cz, naota@elisp.net, rusty@rustcorp.com.au, paulmck@linux.vnet.ibm.com, namhyung@gmail.com, randy.dunlap@oracle.com, tj@kernel.org, cabarnes@indesign-llc.com, akpm@linux-foundation.org, airlied@redhat.com, thellstrom@vmware.com, johnpol@2ka.mipt.ru, JBottomley@parallels.com, bhalevy@panasas.com, bharrosh@panasas.com, a.zummo@towertech.it, guenter.roeck@ericsson.com, khali@linux-fr.org, airlied@linux.ie, Jonathan Cameron Some messing with error codes to return 0 on out id's and match current situation. Is this necessary? Looks a touch 'interesting'. Signed-off-by: Jonathan Cameron --- drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 34 ++++++------------------- 1 files changed, 8 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c index ac6e0d1..d51577b 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c @@ -37,7 +37,6 @@ #include struct vmwgfx_gmrid_man { - spinlock_t lock; struct ida gmr_ida; uint32_t max_gmr_ids; }; @@ -49,34 +48,20 @@ static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, { struct vmwgfx_gmrid_man *gman = (struct vmwgfx_gmrid_man *)man->priv; - int ret; int id; mem->mm_node = NULL; - do { - if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) - return -ENOMEM; - - spin_lock(&gman->lock); - ret = ida_get_new(&gman->gmr_ida, &id); - - if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) { - ida_remove(&gman->gmr_ida, id); - spin_unlock(&gman->lock); + id = ida_simple_get(&gman->gmr_ida, 0, gman->max_gmr_ids, GFP_KERNEL); + if (id < 0) { + if (id == -ENOSPC) return 0; - } - - spin_unlock(&gman->lock); - - } while (ret == -EAGAIN); - - if (likely(ret == 0)) { - mem->mm_node = gman; - mem->start = id; + return id; } + mem->mm_node = gman; + mem->start = id; - return ret; + return 0; } static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man, @@ -86,9 +71,7 @@ static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man, (struct vmwgfx_gmrid_man *)man->priv; if (mem->mm_node) { - spin_lock(&gman->lock); - ida_remove(&gman->gmr_ida, mem->start); - spin_unlock(&gman->lock); + ida_simple_remove(&gman->gmr_ida, mem->start); mem->mm_node = NULL; } } @@ -102,7 +85,6 @@ static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man, if (unlikely(gman == NULL)) return -ENOMEM; - spin_lock_init(&gman->lock); ida_init(&gman->gmr_ida); gman->max_gmr_ids = p_size; man->priv = (void *) gman;