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serial: bfin-uart: avoid dead lock in rx irq handler in smp kernel
authorSteven Miao <realmz6@gmail.com>
Wed, 7 Nov 2012 05:27:56 +0000 (13:27 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 16 Nov 2012 00:59:58 +0000 (16:59 -0800)
Disabing dma irq and lock bottom half in smp kernel doesn't ensure exclusive
uart access. Call spin_lock_irqsave() instead.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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