[tip:timers/core] posix-timers: Fix clock_adjtime to always return timex data on success

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Commit-ID:  f0dbe81f0e7c39783ad25d9084bbcda131508993
Gitweb:     http://git.kernel.org/tip/f0dbe81f0e7c39783ad25d9084bbcda131508993
Author:     Miroslav Lichvar <mlichvar@xxxxxxxxxx>
AuthorDate: Fri, 11 Jan 2013 11:58:58 +0100
Committer:  John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Tue, 15 Jan 2013 18:16:07 -0800

posix-timers: Fix clock_adjtime to always return timex data on success

The clock_adj call returns the clock state on success, which may be a
non-zero value (e.g. TIME_INS), but the modified timex data is copied
back to the user only when zero value (TIME_OK) was returned. Fix the
condition to copy the data also with positive return values.

Signed-off-by: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
 kernel/posix-timers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 69185ae..10349d5 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -997,7 +997,7 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
 
 	err = kc->clock_adj(which_clock, &ktx);
 
-	if (!err && copy_to_user(utx, &ktx, sizeof(ktx)))
+	if (err >= 0 && copy_to_user(utx, &ktx, sizeof(ktx)))
 		return -EFAULT;
 
 	return err;
--
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