@@ -860,6 +860,7 @@ static void msm_handle_tx(struct uart_port *port)
struct circ_buf *xmit = &msm_port->uart.state->xmit;
struct msm_dma *dma = &msm_port->tx_dma;
unsigned int pio_count, dma_count, dma_min;
+ char buf[4] = { 0 };
void __iomem *tf;
int err = 0;
@@ -869,10 +870,12 @@ static void msm_handle_tx(struct uart_port *port)
else
tf = port->membase + UART_TF;
+ buf[0] = port->x_char;
+
if (msm_port->is_uartdm)
msm_reset_dm_count(port, 1);
- iowrite8_rep(tf, &port->x_char, 1);
+ iowrite32_rep(tf, buf, 1);
port->icount.tx++;
port->x_char = 0;
return;
When the tty layer requests the uart to throttle, the current code executing in msm_serial will trigger "Bad mode in Error Handler" and generate an invalid stack frame in pstore before rebooting (that is if pstore is indeed configured: otherwise the user shall just notice a reboot with no further information dumped to the console). This patch replaces the PIO byte accessor with the word accessor already used in PIO mode. Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> --- drivers/tty/serial/msm_serial.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) -- 2.21.0