From:   Anders Roxell <anders.roxell@linaro.org>
To:     stable@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, woojung.huh@microchip.com,
        UNGLinuxDriver@microchip.com, davem@davemloft.net,
        netdev@vger.kernel.org, linux-usb@vger.kernel.org,
        clang-built-linux@googlegroups.com, ulli.kroll@googlemail.com,
        linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org,
        amitkarwar@gmail.com, nishants@marvell.com, gbhat@marvell.com,
        huxinming820@gmail.com, kvalo@codeaurora.org,
        linux-wireless@vger.kernel.org, rostedt@goodmis.org,
        mingo@redhat.com, dmitry.torokhov@gmail.com,
        ndesaulniers@google.com, nathan@kernel.org,
        linux-input@vger.kernel.org,
        Nathan Chancellor <natechancellor@gmail.com>,
        Andy Lavr <andy.lavr@gmail.com>,
        Anders Roxell <anders.roxell@linaro.org>
Subject: [PATCH 4.14 3/6] mwifiex: Remove unnecessary braces from HostCmd_SET_SEQ_NO_BSS_INFO
Date:   Mon, 20 Dec 2021 13:25:03 +0100
Message-Id: <20211220122506.3631672-4-anders.roxell@linaro.org>
In-Reply-To: <20211220122506.3631672-1-anders.roxell@linaro.org>
References: <20211220122506.3631672-1-anders.roxell@linaro.org>
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From: Nathan Chancellor <natechancellor@gmail.com>

commit 6a953dc4dbd1c7057fb765a24f37a5e953c85fb0 upstream.

A new warning in clang points out when macro expansion might result in a
GNU C statement expression. There is an instance of this in the mwifiex
driver:

drivers/net/wireless/marvell/mwifiex/cmdevt.c:217:34: warning: '}' and
')' tokens terminating statement expression appear in different macro
expansion contexts [-Wcompound-token-split-by-macro]
        host_cmd->seq_num = cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
                                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/marvell/mwifiex/fw.h:519:46: note: expanded from
macro 'HostCmd_SET_SEQ_NO_BSS_INFO'
        (((type) & 0x000f) << 12);                  }
                                                    ^

This does not appear to be a real issue. Removing the braces and
replacing them with parentheses will fix the warning and not change the
meaning of the code.

Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/1146
Reported-by: Andy Lavr <andy.lavr@gmail.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
 drivers/net/wireless/marvell/mwifiex/cmdevt.c | 4 ++--
 drivers/net/wireless/marvell/mwifiex/fw.h     | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
index 0edc5d621304..a9cee3dac97b 100644
--- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
@@ -323,9 +323,9 @@ static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
 
 	adapter->seq_num++;
 	sleep_cfm_buf->seq_num =
-		cpu_to_le16((HostCmd_SET_SEQ_NO_BSS_INFO
+		cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
 					(adapter->seq_num, priv->bss_num,
-					 priv->bss_type)));
+					 priv->bss_type));
 
 	mwifiex_dbg(adapter, CMD,
 		    "cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x\n",
diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h b/drivers/net/wireless/marvell/mwifiex/fw.h
index 1d86d29b64cc..c802b73a15c5 100644
--- a/drivers/net/wireless/marvell/mwifiex/fw.h
+++ b/drivers/net/wireless/marvell/mwifiex/fw.h
@@ -498,10 +498,10 @@ enum mwifiex_channel_flags {
 
 #define RF_ANTENNA_AUTO                 0xFFFF
 
-#define HostCmd_SET_SEQ_NO_BSS_INFO(seq, num, type) {   \
-	(((seq) & 0x00ff) |                             \
-	 (((num) & 0x000f) << 8)) |                     \
-	(((type) & 0x000f) << 12);                  }
+#define HostCmd_SET_SEQ_NO_BSS_INFO(seq, num, type) \
+	((((seq) & 0x00ff) |                        \
+	 (((num) & 0x000f) << 8)) |                 \
+	(((type) & 0x000f) << 12))
 
 #define HostCmd_GET_SEQ_NO(seq)       \
 	((seq) & HostCmd_SEQ_NUM_MASK)
-- 
2.34.1