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atm/nicstar: convert to idr_alloc()

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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>
This commit is contained in:
Tejun Heo 2013-02-27 17:04:00 -08:00 committed by Linus Torvalds
parent c718aa652d
commit b051f6edc2
1 changed files with 6 additions and 18 deletions
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24
drivers/atm/nicstar.c
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@ -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;
}
id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
if (id1 < 0)
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);
if (err)
id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
if (id2 < 0)
goto out;
spin_lock_irqsave(&card->res_lock, flags);