serial: imx: simplify tracking of dma being initialized

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The .dma_is_inited member is only set to a value != 0 when the port's
startup function calls imx_uart_dma_init(). On shutdown of the port
imx_uart_dma_exit is called which sets the value back to 0. So
.dma_is_inited is always 0 when imx_startup() is called (assuming
.startup() and .shutdown() are correctly balanced) and the check for
!sport->dma_is_inited can go away.

This allows to replace .dma_is_inited by a variable local to
imx_startup.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Uwe Kleine-König 2018-02-18 22:02:45 +01:00 • committed by Greg Kroah-Hartman

parent 437768962f

commit 4238c00bb1

1 changed files with 4 additions and 8 deletions

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drivers/tty/serial/imx.c

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