spi/topcliff_pch: DMA support

Hello Tomoya MORINAGA,

The patch c37f3c2749b5: "spi/topcliff_pch: DMA support" from Jun 7, 2011, leads to the following gcc warning:
drivers/spi/spi-topcliff-pch.c:325:17: warning: ‘bpw_len’ may be used uninitialized in this function [-Wuninitialized]

It's maybe too old to ask about this now... I'm not sure why it showed up as a new warning on my scripts.

regards,
dan carpenter

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