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dca: convert to idr_alloc()

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Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Cc: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tejun Heo 2013-02-27 17:04:02 -08:00 committed by Linus Torvalds
parent 56de210245
commit 615f2e5c53
1 changed files with 10 additions and 13 deletions
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23
drivers/dca/dca-sysfs.c
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@ -53,22 +53,19 @@ void dca_sysfs_remove_req(struct dca_provider *dca, int slot)
int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev)
{
struct device *cd;
int err = 0;
int ret;
idr_try_again:
if (!idr_pre_get(&dca_idr, GFP_KERNEL))
return -ENOMEM;
idr_preload(GFP_KERNEL);
spin_lock(&dca_idr_lock);
err = idr_get_new(&dca_idr, dca, &dca->id);
ret = idr_alloc(&dca_idr, dca, 0, 0, GFP_NOWAIT);
if (ret >= 0)
dca->id = ret;
spin_unlock(&dca_idr_lock);
switch (err) {
case 0:
break;
case -EAGAIN:
goto idr_try_again;
default:
return err;
}
idr_preload_end();
if (ret < 0)
return ret;
cd = device_create(dca_class, dev, MKDEV(0, 0), NULL, "dca%d", dca->id);
if (IS_ERR(cd)) {