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| author | Jiri Kosina <jkosina@suse.cz> | 2007-04-23 14:41:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-04-24 08:23:09 -0700 |
| commit | 4bf3631cdb012591667ab927fcd7719d92837833 (patch) | |
| tree | 25976c75042f3aa557a7bc8ece781ea4901acc62 /drivers/base/sys.c | |
| parent | c5408b88ecb8b7127334a34c55d4e0174434f4ec (diff) | |
| download | blackbird-op-linux-4bf3631cdb012591667ab927fcd7719d92837833.tar.gz blackbird-op-linux-4bf3631cdb012591667ab927fcd7719d92837833.zip | |
8250: fix possible deadlock between serial8250_handle_port() and serial8250_interrupt()
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>
Diffstat (limited to 'drivers/base/sys.c')
0 files changed, 0 insertions, 0 deletions
