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cfg80211: constify wowlan/coalesce mask/pattern pointers

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This requires changing the nl80211 parsing code a bit to use
intermediate pointers for the allocation, but clarifies the
API towards the drivers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2014-05-19 17:59:50 +02:00
parent c1e5f4714d
commit 922bd80fc3
4 changed files with 26 additions and 21 deletions
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39
net/wireless/nl80211.c
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@@ -8554,6 +8554,8 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
rem) {
u8 *mask_pat;
nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
nla_len(pat), NULL);
err = -EINVAL;
@@ -8577,19 +8579,18 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
goto error;
new_triggers.patterns[i].pkt_offset = pkt_offset;
new_triggers.patterns[i].mask =
kmalloc(mask_len + pat_len, GFP_KERNEL);
if (!new_triggers.patterns[i].mask) {
mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
if (!mask_pat) {
err = -ENOMEM;
goto error;
}
new_triggers.patterns[i].pattern =
new_triggers.patterns[i].mask + mask_len;
memcpy(new_triggers.patterns[i].mask,
nla_data(pat_tb[NL80211_PKTPAT_MASK]),
new_triggers.patterns[i].mask = mask_pat;
memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
mask_len);
mask_pat += mask_len;
new_triggers.patterns[i].pattern = mask_pat;
new_triggers.patterns[i].pattern_len = pat_len;
memcpy(new_triggers.patterns[i].pattern,
memcpy(mask_pat,
nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
pat_len);
i++;
@@ -8781,6 +8782,8 @@ static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
rem) {
u8 *mask_pat;
nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
nla_len(pat), NULL);
if (!pat_tb[NL80211_PKTPAT_MASK] ||
@@ -8802,17 +8805,19 @@ static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
return -EINVAL;
new_rule->patterns[i].pkt_offset = pkt_offset;
new_rule->patterns[i].mask =
kmalloc(mask_len + pat_len, GFP_KERNEL);
if (!new_rule->patterns[i].mask)
mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
if (!mask_pat)
return -ENOMEM;
new_rule->patterns[i].pattern =
new_rule->patterns[i].mask + mask_len;
memcpy(new_rule->patterns[i].mask,
nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
new_rule->patterns[i].mask = mask_pat;
memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
mask_len);
mask_pat += mask_len;
new_rule->patterns[i].pattern = mask_pat;
new_rule->patterns[i].pattern_len = pat_len;
memcpy(new_rule->patterns[i].pattern,
nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
pat_len);
i++;
}