From: Alexander Chiang Date: Tue, 2 Feb 2010 19:07:59 +0000 (+0000) Subject: IB/uverbs: Use stack variable 'devnum' in ib_uverbs_add_one X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=38707980c42c58e2d00b34ecaa40cf5207bdd9d1;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git IB/uverbs: Use stack variable 'devnum' in ib_uverbs_add_one This change is not useful by itself, but it sets us up for a future change that allows us to dynamically allocate device numbers in case we have more than IB_UVERBS_MAX_DEVICES in the system. Signed-off-by: Alex Chiang Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 3f11292dda13..acae9ed05728 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -730,6 +730,7 @@ static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL); static void ib_uverbs_add_one(struct ib_device *device) { + int devnum; struct ib_uverbs_device *uverbs_dev; if (!device->alloc_ucontext) @@ -743,12 +744,13 @@ static void ib_uverbs_add_one(struct ib_device *device) init_completion(&uverbs_dev->comp); spin_lock(&map_lock); - uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); - if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) { + devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES); + if (devnum >= IB_UVERBS_MAX_DEVICES) { spin_unlock(&map_lock); goto err; } - set_bit(uverbs_dev->devnum, dev_map); + uverbs_dev->devnum = devnum; + set_bit(devnum, dev_map); spin_unlock(&map_lock); uverbs_dev->ib_dev = device; @@ -758,7 +760,7 @@ static void ib_uverbs_add_one(struct ib_device *device) uverbs_dev->cdev.owner = THIS_MODULE; uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops; kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum); - if (cdev_add(&uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1)) + if (cdev_add(&uverbs_dev->cdev, IB_UVERBS_BASE_DEV + devnum, 1)) goto err_cdev; uverbs_dev->dev = device_create(uverbs_class, device->dma_device, @@ -781,7 +783,7 @@ err_class: err_cdev: cdev_del(&uverbs_dev->cdev); - clear_bit(uverbs_dev->devnum, dev_map); + clear_bit(devnum, dev_map); err: kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);