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serial: mrst_max3110: Fix race condition between spi transfers
authorBin Gao <bin.gao@intel.com>
Wed, 9 Oct 2013 02:39:17 +0000 (10:39 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 16 Oct 2013 20:08:16 +0000 (13:08 -0700)
There is a race between termios configuration and xmit that can cause the
intel_mid_ssp_spi driver to stall.

Serializing spi transactions fixes the problem.

Signed-off-by: Bin Gao <bin.gao@intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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