Thread (859 messages) flat view 859 messages, 8 authors, 2021-11-16
STALE1733d REVIEWED: 2 (1M)

2 review trailers.

[PATCH 5.14 445/849] platform/x86: thinkpad_acpi: Fix bitwise vs. logical warning

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-15 23:01:57
Also in: lkml
Subsystem: the rest, x86 platform drivers · Maintainers: Linus Torvalds, Hans de Goede, Ilpo Järvinen

From: Nathan Chancellor <nathan@kernel.org>

[ Upstream commit fd96e35ea7b95f1e216277805be89d66e4ae962d ]

A new warning in clang points out a use of bitwise OR with boolean
expressions in this driver:

drivers/platform/x86/thinkpad_acpi.c:9061:11: error: use of bitwise '|' with boolean operands [-Werror,-Wbitwise-instead-of-logical]
        else if ((strlencmp(cmd, "level disengaged") == 0) |
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                           ||
drivers/platform/x86/thinkpad_acpi.c:9061:11: note: cast one or both operands to int to silence this warning
1 error generated.

This should clearly be a logical OR so change it to fix the warning.

Fixes: fe98a52ce754 ("ACPI: thinkpad-acpi: add sysfs support to fan subdriver")
Link: https://github.com/ClangBuiltLinux/linux/issues/1476
Reported-by: Tor Vic <redacted>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20211018182537.2316800-1-nathan@kernel.org (local)
Reviewed-by: Hans de Goede <redacted>
Signed-off-by: Hans de Goede <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/x86/thinkpad_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 50ff04c84650c..27595aba214d9 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9145,7 +9145,7 @@ static int fan_write_cmd_level(const char *cmd, int *rc)
 
 	if (strlencmp(cmd, "level auto") == 0)
 		level = TP_EC_FAN_AUTO;
-	else if ((strlencmp(cmd, "level disengaged") == 0) |
+	else if ((strlencmp(cmd, "level disengaged") == 0) ||
 			(strlencmp(cmd, "level full-speed") == 0))
 		level = TP_EC_FAN_FULLSPEED;
 	else if (sscanf(cmd, "level %d", &level) != 1)
-- 
2.33.0


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