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| author | Andrew Victor <andrew@sanpeople.com> | 2007-02-08 13:04:19 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-02-08 17:55:29 +0300 |
| commit | 3392b309dbd1f1f37454c412c2045448300cf374 (patch) | |
| tree | af9ae43a49a28336617486189066d297ef8e636d | |
| parent | 127a7ec69c9ce17a5add2e3c8c2f1a2733fb88d8 (diff) | |
| download | linux-3392b309dbd1f1f37454c412c2045448300cf374.tar.xz | |
[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>
| -rw-r--r-- | arch/arm/mach-at91/at91sam926x_time.c | 3 |
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 59cbbe1e8161..a4dded27fa16 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; } /* |