[PATCH 24/77] atm/nicstar: convert to idr_alloc()
From: Tejun Heo <tj@kernel.org>
Date: 2013-02-06 19:50:08
Also in:
lkml
Subsystem:
atm, the rest · Maintainers:
Chas Williams, Linus Torvalds
Convert to the much saner new idr interface. The existing code looks
buggy to me - ID 0 is treated as no-ID but allocation specifies 0 as
lower limit and there's no error handling after partial success. This
conversion keeps the bugs unchanged.
Only compile tested.
v2: id1 and id2 are now directly used for -errno return and thus
should be signed. Make them int instead of u32. This was spotted
by kbuild test robot.
v3: Further simplify as suggested by Chas Williams.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Chas Williams <redacted>
Reported-by: kbuild test robot <redacted>
Cc: netdev@vger.kernel.org
---
drivers/atm/nicstar.c | 24 ++++++------------------
1 file changed, 6 insertions(+), 18 deletions(-)
diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 628787e..6587dc2 100644
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c@@ -949,11 +949,10 @@ static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc) static void push_rxbufs(ns_dev * card, struct sk_buff *skb) { struct sk_buff *handle1, *handle2; - u32 id1 = 0, id2 = 0; + int id1, id2; u32 addr1, addr2; u32 stat; unsigned long flags; - int err; /* *BARF* */ handle2 = NULL;
@@ -1026,23 +1025,12 @@ static void push_rxbufs(ns_dev * card, struct sk_buff *skb) card->lbfqc += 2; } - do { - if (!idr_pre_get(&card->idr, GFP_ATOMIC)) { - printk(KERN_ERR - "nicstar%d: no free memory for idr\n", - card->index); - goto out; - } - - if (!id1) - err = idr_get_new_above(&card->idr, handle1, 0, &id1); - - if (!id2 && err == 0) - err = idr_get_new_above(&card->idr, handle2, 0, &id2); - - } while (err == -EAGAIN); + id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC); + if (id1 < 0) + goto out; - if (err) + id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC); + if (id2 < 0) goto out; spin_lock_irqsave(&card->res_lock, flags);
--
1.8.1