On Mon, Apr 09, 2018 at 01:38:39PM -0600, Karthikeyan Ramasubramanian wrote:
> Use iowrite32_rep to write to the hardware FIFO so that the code does
> not have to worry about the system endianness.
>
> Signed-off-by: Karthikeyan Ramasubramanian <kramasub@xxxxxxxxxxxxxx>
> ---
> drivers/tty/serial/qcom_geni_serial.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 3274071..801e6eb 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -600,14 +600,15 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport)
> remaining = chunk;
> for (i = 0; i < chunk; ) {
> unsigned int tx_bytes;
> - unsigned int buf = 0;
> + u8 buf[sizeof(u32)];
> int c;
>
> + memset(buf, 0, ARRAY_SIZE(buf));
> tx_bytes = min_t(size_t, remaining, port->tx_bytes_pw);
> for (c = 0; c < tx_bytes ; c++)
> - buf |= (xmit->buf[tail + c] << (c * BITS_PER_BYTE));
> + buf[c] = xmit->buf[tail + c];
>
> - writel_relaxed(buf, uport->membase + SE_GENI_TX_FIFOn);
> + iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);
>
> i += tx_bytes;
> tail = (tail + tx_bytes) & (UART_XMIT_SIZE - 1);
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
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