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time: Fix signedness bug in sysfs_get_uname() and its callers 

sysfs_get_uname() is erroneously declared as returning size_t even
though it may return a negative value, specifically -EINVAL.  Its
callers then check whether its return value is less than zero and indeed
that is never the case for size_t.

This patch changes sysfs_get_uname() to return ssize_t and makes sure
its callers use ssize_t accordingly.

Signed-off-by: Patrick Palka <patrick@parcs.ath.cx>
[jstultz: Didn't apply cleanly, as a similar partial fix was also applied
so had to resolve the collisions]
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Patrick Palka 2013-10-11 13:11:55 -04:00 committed by John Stultz
parent b7bc50e451
commit 891292a767
3 changed files with 3 additions and 3 deletions
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2
kernel/time/clockevents.c
View File

@ -584,7 +584,7 @@ static ssize_t sysfs_unbind_tick_dev(struct device *dev,
const char *buf, size_t count)
{
char name[CS_NAME_LEN];
size_t ret = sysfs_get_uname(buf, name, count);
ssize_t ret = sysfs_get_uname(buf, name, count);
struct clock_event_device *ce;
if (ret < 0)

2
kernel/time/clocksource.c
View File

@ -909,7 +909,7 @@ sysfs_show_current_clocksources(struct device *dev,
return count;
}
size_t sysfs_get_uname(const char *buf, char *dst, size_t cnt)
ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt)
{
size_t ret = cnt;

2
kernel/time/tick-internal.h
View File

@ -31,7 +31,7 @@ extern void tick_install_replacement(struct clock_event_device *dev);
extern void clockevents_shutdown(struct clock_event_device *dev);
extern size_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
/*
* NO_HZ / high resolution timer shared code