[ARM] 3616/1: fix timer handler wrap logic for a number of platforms

Patch from Lennert Buytenhek

A couple of platforms aren't using the right comparison type in their
timer interrupt handlers (as we're comparing two wrapping timestamps,
we need a bmi/bpl-type comparison, not an unsigned comparison) -- this
patch fixes them up.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/arm/mach-ixp23xx/core.c b/arch/arm/mach-ixp23xx/core.c
index affd1d5d7440..e2aad734080e 100644
--- a/arch/arm/mach-ixp23xx/core.c
+++ b/arch/arm/mach-ixp23xx/core.c
@@ -334,7 +334,7 @@ void __init ixp23xx_init_irq(void)
 /*************************************************************************
  * Timer-tick functions for IXP23xx
  *************************************************************************/
-#define CLOCK_TICKS_PER_USEC    CLOCK_TICK_RATE / (USEC_PER_SEC)
+#define CLOCK_TICKS_PER_USEC    (CLOCK_TICK_RATE / USEC_PER_SEC)
 
 static unsigned long next_jiffy_time;
 
@@ -353,7 +353,7 @@ ixp23xx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
         /* Clear Pending Interrupt by writing '1' to it */
         *IXP23XX_TIMER_STATUS = IXP23XX_TIMER1_INT_PEND;
-        while ((*IXP23XX_TIMER_CONT - next_jiffy_time) > LATCH) {
+        while ((signed long)(*IXP23XX_TIMER_CONT - next_jiffy_time) >= LATCH) {
                 timer_tick(regs);
                 next_jiffy_time += LATCH;
         }