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authorTejun Heo <tj@kernel.org>2013-02-27 17:04:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:15 -0800
commitb051f6edc29c084a6440e9731bc85d95b6b95e14 (patch)
tree6675b9de4a1b74babf9c450888a9b3495b2ffaa9
parentc718aa652d3def382a79c25442c2a830263e52ed (diff)
downloadvexpress-lsk-b051f6edc29c084a6440e9731bc85d95b6b95e14.tar.gz
atm/nicstar: convert to idr_alloc()
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. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Chas Williams <chas@cmf.nrl.navy.mil> Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/atm/nicstar.c24
1 files changed, 6 insertions, 18 deletions
diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 628787ed999..6587dc295eb 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);