Bug#494984: kernel commit 1b7fc5aae8867046f8d3d45808309d5b7f2e036a
I have very strong evidence that the issue was introduced by kernel commit
1b7fc5aae8867046f8d3d45808309d5b7f2e036a
| Author: Alexey Starikovskiy <astarikovskiy@suse.de> 2008-06-06 17:49:33
| Committer: Len Brown <len.brown@intel.com> 2008-06-12 01:13:45
| Branches: git-v2.6.26, master, remotes/origin/master
| Follows: v2.6.26-rc5
| Precedes: v2.6.26-rc6
|
| ACPI: EC: Use msleep instead of udelay while waiting for event.
|
| http://bugzilla.kernel.org/show_bug.cgi?id=10724
|
| Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
| Signed-off-by: Len Brown <len.brown@intel.com>
|
| ------------------------------ drivers/acpi/ec.c ------------------------------
| index 0924992..5622aee 100644
| @@ -194,7 +194,7 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
| while (time_before(jiffies, delay)) {
| if (acpi_ec_check_status(ec, event))
| return 0;
| - udelay(ACPI_EC_UDELAY);
| + msleep(1);
| }
| }
| pr_err(PREFIX "acpi_ec_wait timeout, status = 0x%2.2x, event = %s\n",
|
Undoing this patch in 2.6.26.3 still heals the issue. (This does not mean
that undoing it is the right fix for it. See later messages).
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