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From: Quytelda Kahja <quytelda@tamalin.org>
To: gregkh@linuxfoundation.org, wsa@the-dreams.de
Cc: devel@driverdev.osuosl.org,
	driverdev-devel@linuxdriverproject.org,
	linux-kernel@vger.kernel.org,
	Quytelda Kahja <quytelda@tamalin.org>
Subject: [PATCH 4/4] Staging: ks7010: hostif: Fix multiple use of arguments in ps_confirm_wait_inc() macro.
Date: Fri, 16 Feb 2018 18:25:03 -0800	[thread overview]
Message-ID: <20180217022503.24982-3-quytelda@tamalin.org> (raw)
In-Reply-To: <20180217022503.24982-1-quytelda@tamalin.org>

Use GCC extensions to prevent macro arguments from accidentally being evaluated
multiple times when the macro is called.

Signed-off-by: Quytelda Kahja <quytelda@tamalin.org>
---
 drivers/staging/ks7010/ks_hostif.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c
index 30c9592b3a00..92035e8ac843 100644
--- a/drivers/staging/ks7010/ks_hostif.c
+++ b/drivers/staging/ks7010/ks_hostif.c
@@ -1306,11 +1306,10 @@ int hostif_data_request(struct ks_wlan_private *priv, struct sk_buff *skb)
 	return ret;
 }
 
-#define ps_confirm_wait_inc(priv)					 \
-	do {								 \
-		if (atomic_read(&priv->psstatus.status) > PS_ACTIVE_SET) \
-			atomic_inc(&priv->psstatus.confirm_wait);	 \
-	} while (0)
+#define ps_confirm_wait_inc(priv)					\
+	({ typeof(priv) priv_ = (priv);					\
+		if (atomic_read(&priv_->psstatus.status) > PS_ACTIVE_SET) \
+			atomic_inc(&priv_->psstatus.confirm_wait); })
 
 static
 void hostif_mib_get_request(struct ks_wlan_private *priv,
-- 
2.16.1

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  parent reply	other threads:[~2018-02-17  2:25 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-17  2:25 [PATCH 2/4] Staging: ks7010: hostif: Fix multiple use of arguments in SME queue macros Quytelda Kahja
2018-02-17  2:25 ` [PATCH 3/4] Staging: ks7010: hostif: Fix multiple use of arguments in rate and event masking macros Quytelda Kahja
2018-02-19 17:12   ` Greg KH
2018-02-17  2:25 ` Quytelda Kahja [this message]
2018-02-19 17:08 ` [PATCH 2/4] Staging: ks7010: hostif: Fix multiple use of arguments in SME queue macros Greg KH
2018-02-20  6:35   ` [PATCH v2 1/3] Staging: ks7010: sdio: Convert RX/TX queue macros into real functions Quytelda Kahja
2018-02-20  6:35     ` [PATCH v2 2/3] Staging: ks7010: hostif: Convert SME queue macros to " Quytelda Kahja
2018-02-20  6:35     ` [PATCH v2 3/3] Staging: ks7010: hostif: Convert the ps_confirm_wait_inc() macro to a real function Quytelda Kahja

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