[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, 1 deletions

diff --git a/arch/arm/mach-ixp2000/core.c b/arch/arm/mach-ixp2000/core.c
index 6e8d504aca55..186f632035b8 100644
--- a/arch/arm/mach-ixp2000/core.c
+++ b/arch/arm/mach-ixp2000/core.c
@@ -211,7 +211,8 @@ static int ixp2000_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
         /* clear timer 1 */
         ixp2000_reg_wrb(IXP2000_T1_CLR, 1);
 
-        while ((next_jiffy_time - *missing_jiffy_timer_csr) > ticks_per_jiffy) {
+        while ((signed long)(next_jiffy_time - *missing_jiffy_timer_csr)
+                                                        >= ticks_per_jiffy) {
                 timer_tick(regs);
                 next_jiffy_time -= ticks_per_jiffy;
         }