Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 523/700] serial: fsl_lpuart: dont modify arbitrary data on lpuart32 | Date | Mon, 12 Jul 2021 08:10:06 +0200 |
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From: Michael Walle <michael@walle.cc>
[ Upstream commit ccf08fd1204bcb5311cc10aea037c71c6e74720a ]
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: f4eef224a09f ("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> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/tty/serial/fsl_lpuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 794035041744..fbf2e4d2d22b 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -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); -- 2.30.2
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