[S390] 3270: lock dependency fixes

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Lockdep found a problem with the lock order of the view lock and the
ccw device lock. raw3270_activate_view/raw3270_deactivate_view first
take the ccw device lock then call the activate/deactivate functions
of the view which take view lock. The update functions of the
con3270/tty3270 view will first take the view lock, then take the
ccw device lock. To fix this the activate/deactivate functions are
changed to avoid taking the view lock by moving the functions calls
that modify the 3270 output buffer to the update function which is
called by a timer.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Martin Schwidefsky 2009-06-12 10:26:31 +02:00

parent fcf7581f7c

commit 205d7ab9c9

2 changed files with 32 additions and 48 deletions

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38

drivers/s390/char/con3270.c

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42

drivers/s390/char/tty3270.c

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