mwifiex: Remove unnecessary braces from HostCmd_SET_SEQ_NO_BSS_INFO

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>
Link: https://lore.kernel.org/r/20200901070834.1015754-1-natechancellor@gmail.com

diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
index d068b90..3a11342 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
@@ -322,9 +322,9 @@ 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 8047e30..1f02c50 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/fw.h
+++ b/drivers/net/wireless/marvell/mwifiex/fw.h
@@ -513,10 +513,10 @@ 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)