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(parent: 52592da) | patch
serial: 8250: don't change the fifo trigger level when using dma
authorHeikki Krogerus <heikki.krogerus@linux.intel.com>
Thu, 5 Sep 2013 14:34:52 +0000 (17:34 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 26 Sep 2013 21:27:24 +0000 (14:27 -0700)
commit2797f6fb6727d8ac5127f88aee1fd059db0be24b
tree073d000be0dea568b0da673a79e7f6a1f34ac211tree | snapshot
parent52592da32b85e8be7e6ab534059b9457b3dea4e5commit | diff
serial: 8250: don't change the fifo trigger level when using dma

DMA engines usually expect the fifo trigger level to be
aligned with the burst size. It should not be changed even
with small baud rates. This will fix an issue with
Designware DMA engine where the data can not be transferred
over UART with lower baud rates then 2400.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/8250/8250_core.c diff | blob | history
Domain: System / Uncategorized;