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RDMA/uverbs: Use kernel API to allocate uverbs indexes

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Replace custom code to allocate indexes to generic kernel API.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky 2018-10-02 11:13:29 +03:00 committed by Doug Ledford
parent 7d65cbf0b0
commit 90f6e41cc0
1 changed files with 6 additions and 6 deletions
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12
drivers/infiniband/core/uverbs_main.c
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@ -73,7 +73,7 @@ enum {
static dev_t dynamic_uverbs_dev;
static struct class *uverbs_class;
static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
static DEFINE_IDA(uverbs_ida);
static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
@ -1268,11 +1268,11 @@ static void ib_uverbs_add_one(struct ib_device *device)
rcu_assign_pointer(uverbs_dev->ib_dev, device);
uverbs_dev->num_comp_vectors = device->num_comp_vectors;
devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
if (devnum >= IB_UVERBS_MAX_DEVICES)
devnum = ida_alloc_max(&uverbs_ida, IB_UVERBS_MAX_DEVICES - 1,
GFP_KERNEL);
if (devnum < 0)
goto err;
uverbs_dev->devnum = devnum;
set_bit(devnum, dev_map);
if (devnum >= IB_UVERBS_NUM_FIXED_MINOR)
base = dynamic_uverbs_dev + devnum - IB_UVERBS_NUM_FIXED_MINOR;
else
@ -1296,7 +1296,7 @@ static void ib_uverbs_add_one(struct ib_device *device)
return;
err_uapi:
clear_bit(devnum, dev_map);
ida_free(&uverbs_ida, devnum);
err:
if (atomic_dec_and_test(&uverbs_dev->refcount))
ib_uverbs_comp_dev(uverbs_dev);
@ -1371,7 +1371,7 @@ static void ib_uverbs_remove_one(struct ib_device *device, void *client_data)
return;
cdev_device_del(&uverbs_dev->cdev, &uverbs_dev->dev);
clear_bit(uverbs_dev->devnum, dev_map);
ida_free(&uverbs_ida, uverbs_dev->devnum);
if (device->disassociate_ucontext) {
/* We disassociate HW resources and immediately return.