Staging
v0.8.1
https://github.com/torvalds/linux
Revision 4bf3631cdb012591667ab927fcd7719d92837833 authored by Jiri Kosina on 23 April 2007, 21:41:21 UTC, committed by Linus Torvalds on 24 April 2007, 15:23:09 UTC
Commit 40b36daa introduced possibility that serial8250_backup_timeout() ->
serial8250_handle_port() locks port.lock without disabling irqs, thus
allowing deadlock against interrupt handler (port.lock is acquired in
serial8250_interrupt()).

Spotted by lockdep.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent c5408b8
History
Tip revision: 4bf3631cdb012591667ab927fcd7719d92837833 authored by Jiri Kosina on 23 April 2007, 21:41:21 UTC
8250: fix possible deadlock between serial8250_handle_port() and serial8250_interrupt()
Tip revision: 4bf3631
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