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65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
From 3f8e407c418205252f00615da4d0182e8c960344 Mon Sep 17 00:00:00 2001
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From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
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Date: Tue, 14 Oct 2008 16:02:39 -0700
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Subject: [PATCH 070/134] PM: wakelock: Abort task freezing if a wake lock is held.
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Avoids a problem where the device sometimes hangs for 20 seconds
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before the screen is turned on.
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---
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kernel/power/process.c | 23 ++++++++++++++++++-----
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1 files changed, 18 insertions(+), 5 deletions(-)
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--- a/kernel/power/process.c
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+++ b/kernel/power/process.c
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@@ -13,6 +13,7 @@
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#include <linux/module.h>
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#include <linux/syscalls.h>
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#include <linux/freezer.h>
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+#include <linux/wakelock.h>
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/*
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* Timeout for stopping processes
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@@ -36,6 +37,7 @@ static int try_to_freeze_tasks(bool sig_
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struct timeval start, end;
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u64 elapsed_csecs64;
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unsigned int elapsed_csecs;
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+ unsigned int wakeup = 0;
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do_gettimeofday(&start);
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@@ -62,6 +64,10 @@ static int try_to_freeze_tasks(bool sig_
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} while_each_thread(g, p);
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read_unlock(&tasklist_lock);
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yield(); /* Yield is okay here */
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+ if (todo && has_wake_lock(WAKE_LOCK_SUSPEND)) {
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+ wakeup = 1;
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+ break;
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+ }
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if (time_after(jiffies, end_time))
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break;
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} while (todo);
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@@ -77,11 +83,18 @@ static int try_to_freeze_tasks(bool sig_
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* and caller must call thaw_processes() if something fails),
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* but it cleans up leftover PF_FREEZE requests.
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*/
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- printk("\n");
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- printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
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- "(%d tasks refusing to freeze):\n",
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- elapsed_csecs / 100, elapsed_csecs % 100, todo);
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- show_state();
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+ if(wakeup) {
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+ printk("\n");
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+ printk(KERN_ERR "Freezing of %s aborted\n",
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+ sig_only ? "user space " : "tasks ");
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+ }
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+ else {
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+ printk("\n");
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+ printk(KERN_ERR "Freezing of tasks failed after %d.%02d seconds "
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+ "(%d tasks refusing to freeze):\n",
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+ elapsed_csecs / 100, elapsed_csecs % 100, todo);
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+ show_state();
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+ }
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read_lock(&tasklist_lock);
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do_each_thread(g, p) {
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task_lock(p);
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