From: Tejun Heo Date: Thu, 7 Feb 2013 01:31:35 +0000 (+1100) Subject: atm/nicstar: convert to idr_alloc() X-Git-Tag: next-20130218~1^2~142 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7628eff3be2ad07c70fb026920f00f476e440fac;p=karo-tx-linux.git 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. 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 Acked-by: Chas Williams Reported-by: kbuild test robot Signed-off-by: Andrew Morton --- diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c index 628787ed999c..6587dc295eb0 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);