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authorAndrew Victor <andrew@sanpeople.com>2007-02-08 11:04:19 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-02-08 14:55:29 +0000
commit3392b309dbd1f1f37454c412c2045448300cf374 (patch)
treeaf9ae43a49a28336617486189066d297ef8e636d /arch/arm/mach-at91
parent127a7ec69c9ce17a5add2e3c8c2f1a2733fb88d8 (diff)
[ARM] 4149/1: AT91: Overrun in SAM9 gettimeoffset().
Fix an overrun in the AT91SAM9 gettimeoffset() function. This causes the time value returned by gettimeofday() to jump "backwards". Original patch from Michel Benoit. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-at91')
-rw-r--r--arch/arm/mach-at91/at91sam926x_time.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 59cbbe1e816..a4dded27fa1 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -30,7 +30,6 @@
* Returns number of microseconds since last timer interrupt. Note that interrupts
* will have been disabled by do_gettimeofday()
* 'LATCH' is hwclock ticks (see CLOCK_TICK_RATE in timex.h) per jiffy.
- * 'tick' is usecs per jiffy (linux/timex.h).
*/
static unsigned long at91sam926x_gettimeoffset(void)
{
@@ -39,7 +38,7 @@ static unsigned long at91sam926x_gettimeoffset(void)
elapsed = (PIT_PICNT(t) * LATCH) + PIT_CPIV(t); /* hardware clock cycles */
- return (unsigned long)(elapsed * 1000000) / LATCH;
+ return (unsigned long)(elapsed * jiffies_to_usecs(1)) / LATCH;
}
/*