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IB/uverbs: Remove dev_table 

dev_table's raison d'etre was to associate an inode back to a struct
ib_uverbs_device.

However, now that we've converted ib_uverbs_device to contain an
embedded cdev (instead of a *cdev), we can use the container_of()
macro and cast back to the containing device.

There's no longer any need for dev_table, so get rid of it.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Alexander Chiang 2010-02-02 19:07:54 +00:00 committed by Roland Dreier
parent 055422ddbb
commit 2a72f21226
1 changed files with 5 additions and 19 deletions
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24
drivers/infiniband/core/uverbs_main.c
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@ -74,7 +74,6 @@ DEFINE_IDR(ib_uverbs_qp_idr);
DEFINE_IDR(ib_uverbs_srq_idr);
static DEFINE_SPINLOCK(map_lock);
static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES];
static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
@ -616,14 +615,12 @@ static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
/*
* ib_uverbs_open() does not need the BKL:
*
* - dev_table[] accesses are protected by map_lock, the
* ib_uverbs_device structures are properly reference counted, and
* - the ib_uverbs_device structures are properly reference counted and
* everything else is purely local to the file being created, so
* races against other open calls are not a problem;
* - there is no ioctl method to race against;
* - the device is added to dev_table[] as the last part of module
* initialization, the open method will either immediately run
* -ENXIO, or all required initialization will be done.
* - the open method will either immediately run -ENXIO, or all
* required initialization will be done.
*/
static int ib_uverbs_open(struct inode *inode, struct file *filp)
{
@ -631,13 +628,10 @@ static int ib_uverbs_open(struct inode *inode, struct file *filp)
struct ib_uverbs_file *file;
int ret;
spin_lock(&map_lock);
dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
if (dev)
kref_get(&dev->ref);
spin_unlock(&map_lock);
if (!dev)
else
return -ENXIO;
if (!try_module_get(dev->ib_dev->owner)) {
@ -778,10 +772,6 @@ static void ib_uverbs_add_one(struct ib_device *device)
if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
goto err_class;
spin_lock(&map_lock);
dev_table[uverbs_dev->devnum] = uverbs_dev;
spin_unlock(&map_lock);
ib_set_client_data(device, &uverbs_client, uverbs_dev);
return;
@ -811,10 +801,6 @@ static void ib_uverbs_remove_one(struct ib_device *device)
device_destroy(uverbs_class, uverbs_dev->cdev.dev);
cdev_del(&uverbs_dev->cdev);
spin_lock(&map_lock);
dev_table[uverbs_dev->devnum] = NULL;
spin_unlock(&map_lock);
clear_bit(uverbs_dev->devnum, dev_map);
kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);