[POWERPC] iSeries: don't printk with HV spinlock held

Browse source

Printk was observed to hang during module unload due to a limited
window of characters that may be sent to the hypervisor.  The window
only reexpands when we receive an ack from the HV and the spinlock here
prevents us from ever processing that ack.  This fixes it by dropping
the lock before doing the printk, then looping back to the top to
reacquire the lock.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

...

This commit is contained in:

Stephen Rothwell 2007-12-12 14:58:12 +11:00 • committed by Paul Mackerras

parent da8cadb31b

commit 88f0178e6e

1 changed files with 15 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

17

arch/powerpc/platforms/iseries/lpevents.c

View file