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| author | Yury Georgievskiy <ygeorgie@gmail.com> | 2010-07-20 18:26:50 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 16:47:45 -0400 |
| commit | 0ac8382e9cfdd723445692fc97aaa4643929750d (patch) | |
| tree | e42c65488ea8d839c39441dce939d21ba6d60ae6 /lib/locking-selftest-rlock-softirq.h | |
| parent | 1b6331848b69d1ed165a6bdc75c4046d68767563 (diff) | |
serial: mcf: don't take spinlocks in already protected functions
Don't take the port spinlock in uart functions where the serial core
already takes care of locking/unlocking them.
The code would actually lock up on architectures where spinlocks are
implemented.
Also protect calling mcf_rx_chars/mcf_tx_chars in the interrupt handler by
the port spinlock and use IRQ_RETVAL to return from isr.
[akpm@linux-foundation.org: make irq-handler return value more explicit]
Signed-off-by: Yury Georgievskiy <ygeorgie@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/locking-selftest-rlock-softirq.h')
0 files changed, 0 insertions, 0 deletions