android/android_kernel_samsung_sm8650
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serial: imx: drop check for enabled dma in .startup

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imx_shutdown() calls imx_disable_dma if .dma_is_enabled. So after
imx_shudown() completes, .dma_is_enabled is zero. For this reason
.dma_is_enabled is also zero when imx_startup() is called. So the check
for this variable being zero can be dropped.

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>
This commit is contained in:
Uwe Kleine-König 2018-02-18 22:02:46 +01:00 committed by Greg Kroah-Hartman
parent 4238c00bb1
commit 42afa627c3
1 changed files with 1 additions and 1 deletions
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drivers/tty/serial/imx.c
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@ -1257,7 +1257,7 @@ static int imx_startup(struct uart_port *port)
writel(USR1_RTSD | USR1_DTRD, sport->port.membase + USR1);
writel(USR2_ORE, sport->port.membase + USR2);
if (dma_is_inited && !sport->dma_is_enabled)
if (dma_is_inited)
imx_enable_dma(sport);
temp = readl(sport->port.membase + UCR1) & ~UCR1_RRDYEN;