usb: host: max3421-hcd: fix "spi_rd8" uses dynamic stack allocation warning

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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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David Mosberger-Tang 2014-05-28 22:40:00 -06:00 • committed by Greg Kroah-Hartman

parent 00c5aa178a

commit 05dfa5c9bc

1 changed files with 60 additions and 34 deletions

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drivers/usb/host/max3421-hcd.c

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