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serial: fsl_lpuart: don't modify arbitrary data on lpuart32
lpuart_rx_dma_startup() is used for both the 8 bit and the 32 bit
version of the LPUART. Modify the UARTCR only for the 8 bit version.
Fixes: f4eef224a0
("serial: fsl_lpuart: add sysrq support when using dma")
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20210512141255.18277-2-michael@walle.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1625,7 +1625,7 @@ static void lpuart_rx_dma_startup(struct lpuart_port *sport)
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sport->lpuart_dma_rx_use = true;
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sport->lpuart_dma_rx_use = true;
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rx_dma_timer_init(sport);
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rx_dma_timer_init(sport);
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if (sport->port.has_sysrq) {
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if (sport->port.has_sysrq && !lpuart_is_32(sport)) {
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cr3 = readb(sport->port.membase + UARTCR3);
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cr3 = readb(sport->port.membase + UARTCR3);
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cr3 |= UARTCR3_FEIE;
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cr3 |= UARTCR3_FEIE;
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writeb(cr3, sport->port.membase + UARTCR3);
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writeb(cr3, sport->port.membase + UARTCR3);
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