diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2015-01-13 10:00:26 -0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-02 10:11:24 -0800 |
| commit | 934084a9d2d95d0ce98ae8d1ec3bfe81c95c678c (patch) | |
| tree | ca28c2c469b8d9f7091f89c1575de278de24e3dc /arch/x86/kernel/early_printk.c | |
| parent | bfc2e07f910891516c8eeef61859fa17369fea9f (diff) | |
serial: imx: Fix imx_flush_buffer()
When running an userspace program that does a 'tcflush(fd, TCIOFLUSH)' call
we still see the last received character in the URXD register afterwards.
Clear UCR2_SRST bit so that the UART FIFO is flushed properly.
Since UCR2_SRST also resets some UART registers, we need to save and restore
some of them.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Tested-by: Fugang Duan <B38611@freescale.com>
Acked-by: Jason Liu <r64343@freecale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/early_printk.c')
0 files changed, 0 insertions, 0 deletions