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authorTejun Heo <tj@kernel.org>2013-02-27 17:04:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:18 -0800
commitb98c52b5721f5d88cd9b18aaf532049b44f7815a (patch)
treed7e218596f509dab3bf96eedebfc509a1af06b35 /drivers/scsi/st.c
parent70a9755d5fe71d9ecf3010c5c345449378fb0898 (diff)
scsi: convert to idr_alloc()
Convert to the much saner new idr interface. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/scsi/st.c')
-rw-r--r--drivers/scsi/st.c27
1 files changed, 8 insertions, 19 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 3e2b3717cb5c..86974471af68 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4076,7 +4076,7 @@ static int st_probe(struct device *dev)
struct st_modedef *STm;
struct st_partstat *STps;
struct st_buffer *buffer;
- int i, dev_num, error;
+ int i, error;
char *stp;
if (SDp->type != TYPE_TAPE)
@@ -4178,27 +4178,17 @@ static int st_probe(struct device *dev)
tpnt->blksize_changed = 0;
mutex_init(&tpnt->lock);
- if (!idr_pre_get(&st_index_idr, GFP_KERNEL)) {
- pr_warn("st: idr expansion failed\n");
- error = -ENOMEM;
- goto out_put_disk;
- }
-
+ idr_preload(GFP_KERNEL);
spin_lock(&st_index_lock);
- error = idr_get_new(&st_index_idr, tpnt, &dev_num);
+ error = idr_alloc(&st_index_idr, tpnt, 0, ST_MAX_TAPES + 1, GFP_NOWAIT);
spin_unlock(&st_index_lock);
- if (error) {
+ idr_preload_end();
+ if (error < 0) {
pr_warn("st: idr allocation failed: %d\n", error);
goto out_put_disk;
}
-
- if (dev_num > ST_MAX_TAPES) {
- pr_err("st: Too many tape devices (max. %d).\n", ST_MAX_TAPES);
- goto out_put_index;
- }
-
- tpnt->index = dev_num;
- sprintf(disk->disk_name, "st%d", dev_num);
+ tpnt->index = error;
+ sprintf(disk->disk_name, "st%d", tpnt->index);
dev_set_drvdata(dev, tpnt);
@@ -4218,9 +4208,8 @@ static int st_probe(struct device *dev)
out_remove_devs:
remove_cdevs(tpnt);
-out_put_index:
spin_lock(&st_index_lock);
- idr_remove(&st_index_idr, dev_num);
+ idr_remove(&st_index_idr, tpnt->index);
spin_unlock(&st_index_lock);
out_put_disk:
put_disk(disk);