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cls_flower: Convert to idr_alloc_u32

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Use the new helper which saves a temporary variable and a few lines
of code.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
This commit is contained in:
Matthew Wilcox 2017-11-28 10:53:03 -05:00
parent 0b4ce8da79
commit 85bd0438a2
1 changed files with 10 additions and 16 deletions
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26
net/sched/cls_flower.c
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@ -865,7 +865,6 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
struct cls_fl_filter *fnew;
struct nlattr **tb;
struct fl_flow_mask mask = {};
unsigned long idr_index;
int err;
if (!tca[TCA_OPTIONS])
@ -896,21 +895,17 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
goto errout;
if (!handle) {
err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
1, 0x80000000, GFP_KERNEL);
if (err)
goto errout;
fnew->handle = idr_index;
}
/* user specifies a handle and it doesn't exist */
if (handle && !fold) {
err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
handle, handle + 1, GFP_KERNEL);
if (err)
goto errout;
fnew->handle = idr_index;
handle = 1;
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
INT_MAX, GFP_KERNEL);
} else if (!fold) {
/* user specifies a handle and it doesn't exist */
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
handle, GFP_KERNEL);
}
if (err)
goto errout;
fnew->handle = handle;
if (tb[TCA_FLOWER_FLAGS]) {
fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
@ -966,7 +961,6 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
*arg = fnew;
if (fold) {
fnew->handle = handle;
idr_replace(&head->handle_idr, fnew, fnew->handle);
list_replace_rcu(&fold->list, &fnew->list);
tcf_unbind_filter(tp, &fold->res);