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serial: pl011: (cosmetic) remove superfluous register write 

In pl011_rx_chars() if pl011_dma_rx_trigger_dma() succeeds it will disable
the receive interrupt, no need to do this again.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Guennadi Liakhovetski 2013-12-10 14:54:42 +01:00 committed by Greg Kroah-Hartman
parent 570d291048
commit 30ae585918
1 changed files with 1 additions and 3 deletions
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4
drivers/tty/serial/amba-pl011.c
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@ -1214,8 +1214,8 @@ __acquires(&uap->port.lock)
dev_dbg(uap->port.dev, "could not trigger RX DMA job "
"fall back to interrupt mode again\n");
uap->im |= UART011_RXIM;
writew(uap->im, uap->port.membase + UART011_IMSC);
} else {
uap->im &= ~UART011_RXIM;
#ifdef CONFIG_DMA_ENGINE
/* Start Rx DMA poll */
if (uap->dmarx.poll_rate) {
@ -1227,8 +1227,6 @@ __acquires(&uap->port.lock)
}
#endif
}
writew(uap->im, uap->port.membase + UART011_IMSC);
}
spin_lock(&uap->port.lock);
}