Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7671988b9cd31daf53fd38f8e75c8b881324842b
Commit: 7671988b9cd31daf53fd38f8e75c8b881324842b
Parent: 82644459c592a28a3eab682f9b88d81019ddfe8b
Author: Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Sat Jul 21 04:37:38 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Sat Jul 21 17:49:15 2007 -0700
i386: PIT stop only, when in periodic or oneshot mode
The patch is necessary on one of my boxen, where programming the stop
sequence twice leads to PIT malfunction.
Sigh !
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/i386/kernel/i8253.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/i386/kernel/i8253.c b/arch/i386/kernel/i8253.c
index 931eabe..bde249d 100644
--- a/arch/i386/kernel/i8253.c
+++ b/arch/i386/kernel/i8253.c
@@ -47,9 +47,12 @@ static void init_pit_timer(enum clock_event_mode mode,
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
- outb_p(0x30, PIT_MODE);
- outb_p(0, PIT_CH0); /* LSB */
- outb_p(0, PIT_CH0); /* MSB */
+ if (evt->mode == CLOCK_EVT_MODE_PERIODIC ||
+ evt->mode == CLOCK_EVT_MODE_ONESHOT) {
+ outb_p(0x30, PIT_MODE);
+ outb_p(0, PIT_CH0);
+ outb_p(0, PIT_CH0);
+ }
break;
case CLOCK_EVT_MODE_ONESHOT:
-
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