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authorChristian Borntraeger <borntraeger@de.ibm.com>2008-08-07 09:18:34 +0200
committerRusty Russell <rusty@rustcorp.com.au>2008-08-12 17:52:55 +1000
commitb1b135c8d619cb2c7045d6ee4e48375882518bb5 (patch)
tree7c48ccd12e2d01e548351f34bde77fb13f5dc513 /drivers/oprofile/cpu_buffer.h
parented6d68763b8b589c0ae9d231cbd72bd01f6685c5 (diff)
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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 'drivers/oprofile/cpu_buffer.h')
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