linux-kernel - [PATCH 3/9] hostap: Add missing annotations for prism2_bss_list_proc_start() and prism2_bss_list_proc

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Message-Id: <20200411001933.10072-4-jbi.octave@gmail.com>
Date:   Sat, 11 Apr 2020 01:19:27 +0100
From:   Jules Irenge <jbi.octave@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     boqun.feng@...il.com, Jouni Malinen <j@...fi>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        zhong jiang <zhongjiang@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Alexey Dobriyan <adobriyan@...il.com>,
        linux-wireless@...r.kernel.org (open list:HOST AP DRIVER),
        netdev@...r.kernel.org (open list:NETWORKING DRIVERS)
Subject: [PATCH 3/9] hostap: Add missing annotations for prism2_bss_list_proc_start() and prism2_bss_list_proc_stop

Sparse reports warnings at prism2_bss_list_proc_start() and prism2_bss_list_proc_stop()

warning: context imbalance in prism2_wds_proc_stop() - unexpected unlock
warning: context imbalance in prism2_bss_list_proc_start() - wrong count at exit

The root cause is the missing annotations at prism2_bss_list_proc_start()

Add the missing __acquires(&local->lock) annotation
Add the missing __releases(&local->lock) annotation

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 drivers/net/wireless/intersil/hostap/hostap_proc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/intersil/hostap/hostap_proc.c b/drivers/net/wireless/intersil/hostap/hostap_proc.c
index a2ee4693eaed..97c270845fd1 100644
--- a/drivers/net/wireless/intersil/hostap/hostap_proc.c
+++ b/drivers/net/wireless/intersil/hostap/hostap_proc.c
@@ -149,6 +149,7 @@ static int prism2_bss_list_proc_show(struct seq_file *m, void *v)
 }
 
 static void *prism2_bss_list_proc_start(struct seq_file *m, loff_t *_pos)
+	__acquires(&local->lock)
 {
 	local_info_t *local = PDE_DATA(file_inode(m->file));
 	spin_lock_bh(&local->lock);
@@ -162,6 +163,7 @@ static void *prism2_bss_list_proc_next(struct seq_file *m, void *v, loff_t *_pos
 }
 
 static void prism2_bss_list_proc_stop(struct seq_file *m, void *v)
+	__releases(&local->lock)
 {
 	local_info_t *local = PDE_DATA(file_inode(m->file));
 	spin_unlock_bh(&local->lock);
-- 
2.24.1