Convert to the much saner new idr interface.
Only compile tested.
Signed-off-by: Tejun Heo <t...@kernel.org>
Cc: Rodolfo Giometti <giome...@enneenne.com>
---
This patch depends on an earlier idr changes and I think it would be
best to route these together through -mm. Please holler if there's
any objection. Thanks.
drivers/pps/kapi.c | 2 +-
drivers/pps/pps.c | 36 ++++++++++++++----------------------
2 files changed, 15 insertions(+), 23 deletions(-)
diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c
index f197e8e..cdad4d9 100644
--- a/drivers/pps/kapi.c
+++ b/drivers/pps/kapi.c
@@ -102,7 +102,7 @@ struct pps_device *pps_register_source(struct
pps_source_info *info,
goto pps_register_source_exit;
}
- /* These initializations must be done before calling idr_get_new()
+ /* These initializations must be done before calling idr_alloc()
* in order to avoid reces into pps_event().
*/
pps->params.api_version = PPS_API_VERS;
diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index 2420d5a..de8e663 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -290,29 +290,21 @@ int pps_register_cdev(struct pps_device *pps)
dev_t devt;
mutex_lock(&pps_idr_lock);
- /* Get new ID for the new PPS source */
- if (idr_pre_get(&pps_idr, GFP_KERNEL) == 0) {
- mutex_unlock(&pps_idr_lock);
- return -ENOMEM;
- }
-
- /* Now really allocate the PPS source.
- * After idr_get_new() calling the new source will be freely available
- * into the kernel.
+ /*
+ * Get new ID for the new PPS source. After idr_alloc() calling
+ * the new source will be freely available into the kernel.
*/
- err = idr_get_new(&pps_idr, pps, &pps->id);
- mutex_unlock(&pps_idr_lock);
-
- if (err < 0)
- return err;
-
- pps->id &= MAX_IDR_MASK;
- if (pps->id >= PPS_MAX_SOURCES) {
- pr_err("%s: too many PPS sources in the system\n",
- pps->info.name);
- err = -EBUSY;
- goto free_idr;
+ err = idr_alloc(&pps_idr, pps, 0, PPS_MAX_SOURCES, GFP_KERNEL);
+ if (err < 0) {
+ if (err == -ENOSPC) {
+ pr_err("%s: too many PPS sources in the system\n",
+ pps->info.name);
+ err = -EBUSY;
+ }
+ goto out_unlock;
}
+ pps->id = err;
+ mutex_unlock(&pps_idr_lock);
devt = MKDEV(MAJOR(pps_devt), pps->id);
@@ -345,8 +337,8 @@ del_cdev:
free_idr:
mutex_lock(&pps_idr_lock);
idr_remove(&pps_idr, pps->id);
+out_unlock:
mutex_unlock(&pps_idr_lock);
-
return err;
}
--
1.8.1
--
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