| commit | 656d9125376006cf696b0836f1c6723a892629ca | |
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Fri, 17 Feb 2012 09:29:22 +0000 (17 10:29 +0100) | ||
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Fri, 17 Feb 2012 09:29:33 +0000 (17 10:29 +0100) | ||
| tree | 0e5c7b817c01c408dc6edf28602c31a8b4fef299 | treesnapshot (tar.gz zip) |
| parent | 2320c5793790fcda80e6dcc088dbda86040235e5 | commitdiff |
[S390] 3215 deadlock with tty_wakeup
The 3215 driver calls tty_wakeup from irq context while holding the
device spinlock. If printk is called by any function on the callchain
starting from tty_wakeup the system deadlocks on the device spinlock.
Using a tasklet to call tty_wakup solves the problem.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The 3215 driver calls tty_wakeup from irq context while holding the
device spinlock. If printk is called by any function on the callchain
starting from tty_wakeup the system deadlocks on the device spinlock.
Using a tasklet to call tty_wakup solves the problem.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| drivers/s390/char/con3215.c | diffblobblamehistory |