linux-kernel - [PATCH 5.5 031/257] staging: wilc1000: avoid double unlocking of wilc->hif

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Date:   Thu, 16 Apr 2020 15:21:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kbuild test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Ajay Singh <ajay.kathat@...rochip.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.5 031/257] staging: wilc1000: avoid double unlocking of wilc->hif_cs mutex

From: Ajay Singh <ajay.kathat@...rochip.com>

[ Upstream commit 6c411581caef6e3b2c286871641018364c6db50a ]

Possible double unlocking of 'wilc->hif_cs' mutex was identified by
smatch [1]. Removed the extra call to release_bus() in
wilc_wlan_handle_txq() which was missed in earlier commit fdc2ac1aafc6
("staging: wilc1000: support suspend/resume functionality").

[1]. https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org/thread/NOEVW7C3GV74EWXJO3XX6VT2NKVB2HMT/

Reported-by: kbuild test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Ajay Singh <ajay.kathat@...rochip.com>
Link: https://lore.kernel.org/r/20200221170120.15739-1-ajay.kathat@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/staging/wilc1000/wlan.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/staging/wilc1000/wlan.c b/drivers/staging/wilc1000/wlan.c
index d3de76126b787..3098399741d7b 100644
--- a/drivers/staging/wilc1000/wlan.c
+++ b/drivers/staging/wilc1000/wlan.c
@@ -578,7 +578,6 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 				entries = ((reg >> 3) & 0x3f);
 				break;
 			}
-			release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 		} while (--timeout);
 		if (timeout <= 0) {
 			ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
-- 
2.20.1