From 05dfa5c9bc37933181b619e42ec0eeb41ef31362 Mon Sep 17 00:00:00 2001
From: David Mosberger-Tang <davidm@egauge.net>
Date: Wed, 28 May 2014 22:40:00 -0600
Subject: [PATCH] usb: host: max3421-hcd: fix "spi_rd8" uses dynamic stack
 allocation warning

kmalloc the SPI rx and tx data buffers.  This appears to be the only
portable way to guarantee that the buffers are DMA-safe (e.g., in
separate DMA cache-lines).  This patch makes the spi_rdX()/spi_wrX()
non-reentrant, but that's OK because calls to them are guaranteed to
be serialized by the per-HCD SPI-thread.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David Mosberger <davidm@egauge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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