linux-kernel - [PATCH] rtw88: Made RA

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Date:   Thu,  2 May 2019 08:00:22 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Yan-Hsuan Chuang <yhchuang@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] rtw88: Made RA_MASK macros ULL

Clang warns about the definitions of these macros (full warnings trimmed
for brevity):

drivers/net/wireless/realtek/rtw88/main.c:524:15: warning: signed shift
result (0x3FF00000000) requires 43 bits to represent, but 'int' only has
32 bits [-Wshift-overflow]
                        ra_mask &= RA_MASK_VHT_RATES | RA_MASK_OFDM_IN_VHT;
                                   ^~~~~~~~~~~~~~~~~
drivers/net/wireless/realtek/rtw88/main.c:527:15: warning: signed shift
result (0xFF0000000) requires 37 bits to represent, but 'int' only has
32 bits [-Wshift-overflow]
                        ra_mask &= RA_MASK_HT_RATES | RA_MASK_OFDM_IN_HT_5G;
                                   ^~~~~~~~~~~~~~~~

Given that these are all used with ra_mask, which is of type u64, we can
just declare the macros to be ULL as well.

Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/467
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 drivers/net/wireless/realtek/rtw88/main.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 9893e5e297e3..a14a5f1b4b6d 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -462,15 +462,15 @@ static u8 get_rate_id(u8 wireless_set, enum rtw_bandwidth bw_mode, u8 tx_num)
 
 #define RA_MASK_CCK_RATES	0x0000f
 #define RA_MASK_OFDM_RATES	0x00ff0
-#define RA_MASK_HT_RATES_1SS	(0xff000 << 0)
-#define RA_MASK_HT_RATES_2SS	(0xff000 << 8)
-#define RA_MASK_HT_RATES_3SS	(0xff000 << 16)
+#define RA_MASK_HT_RATES_1SS	(0xff000ULL << 0)
+#define RA_MASK_HT_RATES_2SS	(0xff000ULL << 8)
+#define RA_MASK_HT_RATES_3SS	(0xff000ULL << 16)
 #define RA_MASK_HT_RATES	(RA_MASK_HT_RATES_1SS | \
 				 RA_MASK_HT_RATES_2SS | \
 				 RA_MASK_HT_RATES_3SS)
-#define RA_MASK_VHT_RATES_1SS	(0x3ff000 << 0)
-#define RA_MASK_VHT_RATES_2SS	(0x3ff000 << 10)
-#define RA_MASK_VHT_RATES_3SS	(0x3ff000 << 20)
+#define RA_MASK_VHT_RATES_1SS	(0x3ff000ULL << 0)
+#define RA_MASK_VHT_RATES_2SS	(0x3ff000ULL << 10)
+#define RA_MASK_VHT_RATES_3SS	(0x3ff000ULL << 20)
 #define RA_MASK_VHT_RATES	(RA_MASK_VHT_RATES_1SS | \
 				 RA_MASK_VHT_RATES_2SS | \
 				 RA_MASK_VHT_RATES_3SS)
-- 
2.21.0