mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

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>
This commit is contained in:
Michael Walle 2021-05-12 16:12:47 +02:00 committed by Greg Kroah-Hartman
parent fcb10ee27f
commit ccf08fd120
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/tty/serial/fsl_lpuart.c
View File

@ -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);