https://github.com/torvalds/linux
Revision 4a9949d7ac9e2bc51939f27b184be6e1bd99004e authored by Andy Wingo on 20 October 2005, 04:23:46 UTC, committed by Linus Torvalds on 20 October 2005, 06:04:30 UTC
Changes all spinlocks that can be held during an irq handler to disable interrupts while the lock is held. Changes spin_[un]lock_irq to use the irqsave/irqrestore variants for robustness and readability. In raw1394.c:handle_iso_listen(), don't grab host_info_lock at all -- we're not accessing host_info_list or host_count, and holding this lock while trying to tasklet_kill the iso tasklet this can cause an ABBA deadlock if ohci:dma_rcv_tasklet is running and tries to grab host_info_lock in raw1394.c:receive_iso. Test program attached reliably deadlocks all SMP machines I have been able to test without this patch. Signed-off-by: Andy Wingo <wingo@pobox.com> Acked-by: Ben Collins <bcollins@ubuntu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Tip revision: 4a9949d7ac9e2bc51939f27b184be6e1bd99004e authored by Andy Wingo on 20 October 2005, 04:23:46 UTC
[PATCH] raw1394: fix locking in the presence of SMP and interrupts
[PATCH] raw1394: fix locking in the presence of SMP and interrupts
Tip revision: 4a9949d
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| scripts | ||
| security | ||
| sound | ||
| usr | ||
| .gitignore | -rw-r--r-- | 391 bytes |
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| MAINTAINERS | -rw-r--r-- | 59.6 KB |
| Makefile | -rw-r--r-- | 42.5 KB |
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| REPORTING-BUGS | -rw-r--r-- | 3.0 KB |
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