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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-08-07 11:18:34 +0400 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-08-12 11:52:55 +0400 |
| commit | b1b135c8d619cb2c7045d6ee4e48375882518bb5 (patch) | |
| tree | 7c48ccd12e2d01e548351f34bde77fb13f5dc513 /mm | |
| parent | ed6d68763b8b589c0ae9d231cbd72bd01f6685c5 (diff) | |
| download | linux-b1b135c8d619cb2c7045d6ee4e48375882518bb5.tar.xz | |
fix spinlock recursion in hvc_console
commit 611e097d7707741a336a0677d9d69bec40f29f3d
Author: Christian Borntraeger <borntraeger@de.ibm.com>
hvc_console: rework setup to replace irq functions with callbacks
introduced a spinlock recursion problem.
request_irq tries to call the handler if the IRQ is shared.
The irq handler of hvc_console calls hvc_poll and hvc_kill
which might take the hvc_struct spinlock. Therefore, we have
to call request_irq outside the spinlock.
We can move the notifier_add safely outside the spinlock as ->data must
not be changed by the backend. Otherwise, tty_hangup would fail anyway.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions