[PATCH] jffs2_gcd_mtd3, Stopping kernel threads timed out

[Uli Luckas]

Hi
We experience the following problem when our board tries to suspend:

Jun  7 18:32:21 constin kernel: [ 2085.350000] Stopping tasks ... 
Jun  7 18:32:21 constin kernel: [ 2105.410000] Stopping kernel threads timed 
out after 20 seconds (1 tasks refusing to freeze):
Jun  7 18:32:21 constin kernel: [ 2105.410000]  jffs2_gcd_mtd3
Jun  7 18:32:21 constin kernel: [ 2105.410000] Restarting tasks ... <4> 
Strange, jffs2_gcd_mtd3 not stopped
Jun  7 18:32:21 constin kernel: [ 2105.440000] done.

The problem seems to happen, when suspend kicks in, after the call to 
try_to_freeze and before the while loop in jffs2_garbage_collect_thread.

The pending freeze will cause signal_pending to return true until the 
attempted suspend is over and thereby the while loop won't terminate until 
the suspend times out.

This patch will call try_to_freeze from within the while loop and adds an 
extra check for jffs2_thread_should_wake before we actually do the GC to 
avoid calling jffs2_garbage_collect_pass at every wakeup.

If there are no objections, please apply and push to mainline.

Signed-off-by: Uli Luckas <u.luckas at road.de>

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