linux-kernel - [PATCH] wlcore: mesh: handle failure case of pm_runtime_get

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Date:   Thu,  4 Jun 2020 22:27:31 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Johannes Berg <johannes.berg@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hari Nagalla <hnagalla@...il.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Maital Hahn <maitalm@...com>,
        Fuqian Huang <huangfq.daxian@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     emamd001@....edu, wu000273@....edu, kjlu@....edu, smccaman@....edu
Subject: [PATCH] wlcore: mesh: handle failure case of pm_runtime_get_sync

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 drivers/net/wireless/ti/wlcore/main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index f140f7d7f553..c7e4f5a80b9e 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -3662,8 +3662,10 @@ void wlcore_regdomain_config(struct wl1271 *wl)
 		goto out;
 
 	ret = pm_runtime_get_sync(wl->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_autosuspend(wl->dev);
 		goto out;
+	}
 
 	ret = wlcore_cmd_regdomain_config_locked(wl);
 	if (ret < 0) {
-- 
2.17.1