[PATCH v3 0/2] serial: mxs-auart: wait for DMA buffer to flush before shutdown

[Hector Palacios]

This fixes a bug whereby the AUART was shutdown while bytes
were still waiting in the DMA buffer to be transmistted.

Changes since v2:
 * Added Reviewed/Acked-by tags to first commit.
 * Move tx_empty callback up to avoid forward declaration.
 * Move BUSY flag check to tx_empty callback to avoid check
   on shutdown call.

Changes since v1:
 * Split the patch in two: one to set the fifosize to the
   DMA buffer size, and another to wait for the FIFO to empty
   before disabling the AUART.
 * The wait for the fifo to empty is now independent of DMA
   being enabled.
 * Fix bug on readl() call
 * Remove bad URL in commit log


Hector Palacios (2):
  serial: mxs-auart: set the FIFO size to DMA buffer size
  serial: mxs-auart: wait for FIFO to flush before shutdown

 drivers/tty/serial/mxs-auart.c | 34 +++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)

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1.8.4