From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: johannes@sipsolutions.net, davem@davemloft.net, kuba@kernel.org
Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: [PATCH 1/2] nl80211: Remove a misleading label in 'nl80211_trigger_scan()'
Date: Sun, 12 Jul 2020 19:35:39 +0200 [thread overview]
Message-ID: <20200712173539.274395-1-christophe.jaillet@wanadoo.fr> (raw)
Since commit 5fe231e87372 ("cfg80211: vastly simplify locking"), the
'unlock' label at the end of 'nl80211_trigger_scan()' is useless and
misleading, because nothing is unlocked there.
Direct return can be used instead of 'err = -<error code>; goto unlock;'
construction.
Remove this label and simplify code accordingly.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
net/wireless/nl80211.c | 31 ++++++++++---------------------
1 file changed, 10 insertions(+), 21 deletions(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 98bfc6a1c806..a671ee5f5da7 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7774,10 +7774,8 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
if (!rdev->ops->scan)
return -EOPNOTSUPP;
- if (rdev->scan_req || rdev->scan_msg) {
- err = -EBUSY;
- goto unlock;
- }
+ if (rdev->scan_req || rdev->scan_msg)
+ return -EBUSY;
if (info->attrs[NL80211_ATTR_SCAN_FREQ_KHZ]) {
if (!wiphy_ext_feature_isset(wiphy,
@@ -7790,10 +7788,8 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
if (scan_freqs) {
n_channels = validate_scan_freqs(scan_freqs);
- if (!n_channels) {
- err = -EINVAL;
- goto unlock;
- }
+ if (!n_channels)
+ return -EINVAL;
} else {
n_channels = ieee80211_get_num_supported_channels(wiphy);
}
@@ -7802,29 +7798,23 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
n_ssids++;
- if (n_ssids > wiphy->max_scan_ssids) {
- err = -EINVAL;
- goto unlock;
- }
+ if (n_ssids > wiphy->max_scan_ssids)
+ return -EINVAL;
if (info->attrs[NL80211_ATTR_IE])
ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
else
ie_len = 0;
- if (ie_len > wiphy->max_scan_ie_len) {
- err = -EINVAL;
- goto unlock;
- }
+ if (ie_len > wiphy->max_scan_ie_len)
+ return -EINVAL;
request = kzalloc(sizeof(*request)
+ sizeof(*request->ssids) * n_ssids
+ sizeof(*request->channels) * n_channels
+ ie_len, GFP_KERNEL);
- if (!request) {
- err = -ENOMEM;
- goto unlock;
- }
+ if (!request)
+ return -ENOMEM;
if (n_ssids)
request->ssids = (void *)&request->channels[n_channels];
@@ -8013,7 +8003,6 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
kfree(request);
}
- unlock:
return err;
}
--
2.25.1
reply other threads:[~2020-07-12 17:35 UTC|newest]
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