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| author | Leon Romanovsky <leonro@mellanox.com> | 2018-10-02 11:13:29 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-10-16 14:36:21 -0400 |
| commit | 90f6e41cc03a4055d56e94ad7c97df4b1add7f61 (patch) | |
| tree | 4862901356fa3a741226db9807f0d4dcad8afb7f /drivers/infiniband | |
| parent | 7d65cbf0b0ac7d7eebf397ff9af6645b2b3004c2 (diff) | |
| download | blackbird-obmc-linux-90f6e41cc03a4055d56e94ad7c97df4b1add7f61.tar.gz blackbird-obmc-linux-90f6e41cc03a4055d56e94ad7c97df4b1add7f61.zip | |
RDMA/uverbs: Use kernel API to allocate uverbs indexes
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>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 4258cbd55ed7..6d373f5515b7 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -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. |
