linux-kernel - [PATCH 4.9 42/63] hpet: Make cmd parameter of hpet_ioctl

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Message-Id: <20190225195039.026848745@linuxfoundation.org>
Date:   Mon, 25 Feb 2019 22:11:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Matthias Kaehlcke <mka@...omium.org>,
        Clemens Ladisch <clemens@...isch.de>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH 4.9 42/63] hpet: Make cmd parameter of hpet_ioctl_common() unsigned

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matthias Kaehlcke <mka@...omium.org>

commit 5cd5e6ad0ede862432e1e766bfe02a9ad447533e upstream.

The value passed by the two callers of the function is unsigned anyway.

Making the parameter unsigned fixes the following warning when building
with clang:

drivers/char/hpet.c:588:7: error: overflow converting case value to switch condition type (2149083139 to 18446744071563667459) [-Werror,-Wswitch]
        case HPET_INFO:
             ^
include/uapi/linux/hpet.h:18:19: note: expanded from macro 'HPET_INFO'
                        ^
include/uapi/asm-generic/ioctl.h:77:28: note: expanded from macro '_IOR'
                                ^
include/uapi/asm-generic/ioctl.h:66:2: note: expanded from macro '_IOC'
        (((dir)  << _IOC_DIRSHIFT) | \

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Acked-by: Clemens Ladisch <clemens@...isch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/hpet.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -574,7 +574,7 @@ static inline unsigned long hpet_time_di
 }
 
 static int
-hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg,
+hpet_ioctl_common(struct hpet_dev *devp, unsigned int cmd, unsigned long arg,
 		  struct hpet_info *info)
 {
 	struct hpet_timer __iomem *timer;