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Date: Wed, 15 Jun 2016 17:10:51 -0400 From: Jes Sorensen <Jes.Sorensen@...hat.com> To: Arnd Bergmann <arnd@...db.de> Cc: Kalle Valo <kvalo@...eaurora.org>, Larry Finger <Larry.Finger@...inger.net>, Chaoming Li <chaoming_li@...lsil.com.cn>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] rtlwifi: use s8 instead of char Arnd Bergmann <arnd@...db.de> writes: > Compiling the rtlwifi drivers for ARM with gcc -Wextra warns about lots of > incorrect code that results from 'char' being unsigned here, e.g. > > realtek/rtlwifi/rc.c:113:18: error: comparison is always true due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8188ee/dm.c:1070:22: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8192ce/trx.c:54:16: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8192cu/mac.c:601:16: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8192de/trx.c:53:16: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8192ee/phy.c:1268:12: error: comparison is always true due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8192se/rf.c:150:20: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8723be/dm.c:877:29: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8723be/phy.c:386:16: error: comparison is always true due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8821ae/dm.c:1514:38: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8821ae/phy.c:1558:11: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8821ae/phy.c:386:24: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/rtl8821ae/trx.c:55:12: error: comparison is always false due to limited range of data type [-Werror=type-limits] > realtek/rtlwifi/stats.c:31:16: error: comparison is always false due to limited range of data type [-Werror=type-limits] > > This patch changes all uses of 'char' in this driver that refer to > 8-bit integers to use 's8' instead, which is signed on all architectures. > > Signed-off-by: Arnd Bergmann <arnd@...db.de> > --- > drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 6 +- > .../realtek/rtlwifi/btcoexist/halbtcoutsrc.c | 2 +- > .../realtek/rtlwifi/btcoexist/halbtcoutsrc.h | 4 +- > drivers/net/wireless/realtek/rtlwifi/rc.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8188ee/dm.c | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8188ee/trx.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8188ee/trx.h | 4 +- > .../wireless/realtek/rtlwifi/rtl8192c/dm_common.h | 2 +- > .../wireless/realtek/rtlwifi/rtl8192c/phy_common.c | 4 +- > .../wireless/realtek/rtlwifi/rtl8192c/phy_common.h | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192ce/phy.h | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192ce/trx.c | 6 +- > .../net/wireless/realtek/rtlwifi/rtl8192ce/trx.h | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8192cu/mac.c | 6 +- > .../net/wireless/realtek/rtlwifi/rtl8192cu/mac.h | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192de/phy.h | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192de/trx.c | 6 +- > .../net/wireless/realtek/rtlwifi/rtl8192de/trx.h | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8192ee/phy.c | 10 ++-- > .../net/wireless/realtek/rtlwifi/rtl8192ee/phy.h | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192ee/trx.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8192ee/trx.h | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8192se/rf.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8723ae/trx.h | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8723be/dm.c | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8723be/phy.c | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8723be/trx.c | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8723be/trx.h | 8 +-- > .../net/wireless/realtek/rtlwifi/rtl8821ae/dm.c | 4 +- > .../net/wireless/realtek/rtlwifi/rtl8821ae/phy.c | 48 +++++++-------- > .../net/wireless/realtek/rtlwifi/rtl8821ae/phy.h | 2 +- > .../net/wireless/realtek/rtlwifi/rtl8821ae/trx.c | 12 ++-- > .../net/wireless/realtek/rtlwifi/rtl8821ae/trx.h | 10 ++-- > drivers/net/wireless/realtek/rtlwifi/stats.c | 6 +- > drivers/net/wireless/realtek/rtlwifi/stats.h | 4 +- > drivers/net/wireless/realtek/rtlwifi/wifi.h | 68 > +++++++++++---------- Arnd, rtlwifi and rtl8xxxu are two distinct drivers managed by different people. I'd be really nice if you could split this into a per driver patch. That said, the use of char in rtl8xxxu is all as a flag indicator, so I don't think the s/char/s8/ conversion is justified. I used char rather than ugly bool to reduce the size of the struct. Cheers, Jes
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