serial: imx: clean up imx_poll_put_char()

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imx_put_poll_char() has been simplified to remove the code to disable
interrupts. The present code can corrupt register state when re-entered
from FIQ handler.

Switch to _relaxed() MMIO functions (which are safe for polled I/O and
needed to avoid taking spin locks).

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Huang Shijie <b32955@freescale.com>
Cc: linux-serial@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Daniel Thompson 2014-10-28 09:28:07 +01:00 • committed by Greg Kroah-Hartman

parent 97f7547103

commit f968ef3494

1 changed files with 5 additions and 19 deletions

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drivers/tty/serial/imx.c

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