clockevents: fix resume logic

We need to make sure, that the clockevent devices are resumed, before
the tick is resumed. The current resume logic does not guarantee this.

Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock
event devices before resuming the tick / oneshot functionality.

Fixup the existing users.

Thanks to Nigel Cunningham for tracking down a long standing thinko,
which affected the jinxed VAIO.

[akpm@linux-foundation.org: xen build fix]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
index 4d8425de6922..e96a3dcdc1a7 100644
--- a/arch/arm/mach-davinci/time.c
+++ b/arch/arm/mach-davinci/time.c
@@ -285,6 +285,8 @@ static void davinci_set_mode(enum clock_event_mode mode,
         case CLOCK_EVT_MODE_SHUTDOWN:
                 t->opts = TIMER_OPTS_DISABLED;
                 break;
+        case CLOCK_EVT_MODE_RESUME:
+                break;
         }
 }
 
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index 010f6fa984a6..d86d124aea22 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -159,6 +159,7 @@ static void imx_set_mode(enum clock_event_mode mode, struct clock_event_device *
                 break;
         case CLOCK_EVT_MODE_SHUTDOWN:
         case CLOCK_EVT_MODE_UNUSED:
+        case CLOCK_EVT_MODE_RESUME:
                 /* Left event sources disabled, no more interrupts appears */
                 break;
         }
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 8112f726ffa0..23e7fba6d3e1 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -459,6 +459,8 @@ static void ixp4xx_set_mode(enum clock_event_mode mode,
         default:
                 osrt = opts = 0;
                 break;
+        case CLOCK_EVT_MODE_RESUME:
+                break;
         }
 
         *IXP4XX_OSRT1 = osrt | opts;
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index 3705d20c4e5c..237651ebae5d 100644
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -156,6 +156,7 @@ static void omap_mpu_set_mode(enum clock_event_mode mode,
                 break;
         case CLOCK_EVT_MODE_UNUSED:
         case CLOCK_EVT_MODE_SHUTDOWN:
+        case CLOCK_EVT_MODE_RESUME:
                 break;
         }
 }
diff --git a/arch/arm/plat-omap/timer32k.c b/arch/arm/plat-omap/timer32k.c
index 2feceec8eccd..b0af014b0e2c 100644
--- a/arch/arm/plat-omap/timer32k.c
+++ b/arch/arm/plat-omap/timer32k.c
@@ -156,6 +156,8 @@ static void omap_32k_timer_set_mode(enum clock_event_mode mode,
         case CLOCK_EVT_MODE_SHUTDOWN:
                 omap_32k_timer_stop();
                 break;
+        case CLOCK_EVT_MODE_RESUME:
+                break;
         }
 }