From: Laurent Dufour
> Sent: 31 July 2015 10:30
> This patch fixes several endianness issues detected when running the HVSI
> driver in little endian mode.
>
> These issues are raised in little endian mode because the data exchanged in
> memory between the kernel and the hypervisor has to be in big endian
> format.
...
> diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
> index 41901997c0d6..a75146f600cb 100644
> --- a/drivers/tty/hvc/hvsi.c
> +++ b/drivers/tty/hvc/hvsi.c
> @@ -240,9 +240,9 @@ static void hvsi_recv_control(struct hvsi_struct *hp,
> uint8_t *packet,
> {
> struct hvsi_control *header = (struct hvsi_control *)packet;
>
> - switch (header->verb) {
> + switch (be16_to_cpu(header->verb)) {
> case VSV_MODEM_CTL_UPDATE:
> - if ((header->word & HVSI_TSCD) == 0) {
> + if ((be32_to_cpu(header->word) & HVSI_TSCD) == 0) {
It is generally best to byteswap constants.
David
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