Commit ccf08fd1 authored by Michael Walle's avatar Michael Walle Committed by Greg Kroah-Hartman
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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: f4eef224 ("serial: fsl_lpuart: add sysrq support when using dma")
Signed-off-by: default avatarMichael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20210512141255.18277-2-michael@walle.cc


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fcb10ee2

drivers/tty/serial/fsl_lpuart.c

+1 −1
Original line number Diff line number Diff line
@@ -1625,7 +1625,7 @@ static void lpuart_rx_dma_startup(struct lpuart_port *sport) 
	sport->lpuart_dma_rx_use = true;

	rx_dma_timer_init(sport);



	if (sport->port.has_sysrq) {

	if (sport->port.has_sysrq && !lpuart_is_32(sport)) {

		cr3 = readb(sport->port.membase + UARTCR3);

		cr3 |= UARTCR3_FEIE;

		writeb(cr3, sport->port.membase + UARTCR3);