On 06/19/2012 02:36 PM, Marc Kleine-Budde wrote:

> on ARM using dfu mode we've seen problems with dma memory allocations.
> Some drivers use dma_inv_range on allocated buffers, which corrupts memory
> around the buffer, it it's not aligned to cache lines. This series
> introduces: dma_alloc() and dma_free() that allocate memory aligned to
> cache lines. This is 64 bytes on ARM (just to be sure) and
> DCACHE_LINE_SIZE on nios2. All other arch do a transparent xmalloc.
> 
> Feel free to add the appropriate alignment for your architecture to
> "include/asm/dma.h"

You can pull this series:

The following changes since commit 4c8d356a104d592088c6ec93b052cec9f6ff19ea:

  Merge branch 'for-next/mx28-ocotp' into next (2012-06-14 20:31:50 +0200)

are available in the git repository at:

  git.pengutronix.de:/git/mkl/barebox.git for-next/dma_alloc

Marc Kleine-Budde (4):
      ARM mmu: don't use CONFIG_MMU to disable mmu code, there are static inline versions
      ARM mmu: introduce dma_alloc, dma_free
      nios: add dma_alloc, dma_free and asm/dma.h
      blackfin, mips, openrisc, ppc, sandbox, x86: add transparent dma_alloc, dma_free inlines

Sascha Hauer (2):
      USB gadget fsl: request cacheline aligned buffer
      USB gadget: Fix dma memory allocations

 arch/arm/cpu/mmu.c                   |    4 ----
 arch/arm/include/asm/dma.h           |    8 ++++++++
 arch/arm/include/asm/mmu.h           |   10 ++++++++++
 arch/blackfin/include/asm/dma.h      |   21 +++++++++++++++++++++
 arch/mips/include/asm/dma.h          |   21 +++++++++++++++++++++
 arch/nios2/include/asm/dma-mapping.h |   10 ++++++++++
 arch/nios2/include/asm/dma.h         |    8 ++++++++
 arch/openrisc/include/asm/dma.h      |   21 +++++++++++++++++++++
 arch/ppc/include/asm/dma.h           |   21 +++++++++++++++++++++
 arch/sandbox/include/asm/dma.h       |   21 +++++++++++++++++++++
 arch/x86/include/asm/dma.h           |   21 +++++++++++++++++++++
 drivers/usb/gadget/composite.c       |    5 +++--
 drivers/usb/gadget/dfu.c             |    5 +++--
 drivers/usb/gadget/fsl_udc.c         |    5 +++--
 14 files changed, 171 insertions(+), 10 deletions(-)
 create mode 100644 arch/arm/include/asm/dma.h
 create mode 100644 arch/blackfin/include/asm/dma.h
 create mode 100644 arch/mips/include/asm/dma.h
 create mode 100644 arch/nios2/include/asm/dma.h
 create mode 100644 arch/openrisc/include/asm/dma.h
 create mode 100644 arch/ppc/include/asm/dma.h
 create mode 100644 arch/sandbox/include/asm/dma.h
 create mode 100644 arch/x86/include/asm/dma.h

Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
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Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |