diff options
| author |   Michael Walle <michael@walle.cc> | 2021-05-12 16:12:47 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 16:08:26 +0200 |
| commit | ccf08fd1204bcb5311cc10aea037c71c6e74720a (patch) | |
| tree | 5ff1979cfb9eb1bfca740eea4def8d41e5f9cf80 /drivers/tty | |
| parent | tty: serial: fsl_lpuart: fix the potential risk of division or modulo by zero (diff) | |
| download | linux-dev-ccf08fd1204bcb5311cc10aea037c71c6e74720a.tar.xz linux-dev-ccf08fd1204bcb5311cc10aea037c71c6e74720a.zip | |
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: 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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 777d54b593f8..120527cb8a81 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); |