On 11 October 2017 at 15:42, Stefan Berger <stefanb@linux.vnet.ibm.com> wrote:
> EBADMSG was only added to OpenBSD very recently. To make QEMU compilable
> on older OpenBSD versions use EMSGSIZE instead when a mismatch between
> number of received bytes and message size indicated in the header was
> found.
>
> Return -EMSGSIZE and convert all other errnos in the same functions to
> return the negative errno.
>
> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> ---
> hw/tpm/tpm_util.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c
> index fb929f6..a83c6f4 100644
> --- a/hw/tpm/tpm_util.c
> +++ b/hw/tpm/tpm_util.c
> @@ -71,7 +71,7 @@ static int tpm_util_test(int fd,
> return errno;
> }
> if (n != requestlen) {
> - return EFAULT;
> + return -EFAULT;
> }
>
> FD_ZERO(&readfds);
> @@ -85,13 +85,13 @@ static int tpm_util_test(int fd,
>
> n = read(fd, &buf, sizeof(buf));
> if (n < sizeof(struct tpm_resp_hdr)) {
> - return EFAULT;
> + return -EFAULT;
> }
>
> resp = (struct tpm_resp_hdr *)buf;
> /* check the header */
> if (be32_to_cpu(resp->len) != n) {
> - return EBADMSG;
> + return -EMSGSIZE;
> }
>
> *return_tag = be16_to_cpu(resp->tag);
You also need to change the "return errno;" lines. "errno"
contains positive errno values, so for a "return 0-or-negative-errno"
convention you want "return -errno;".
thanks
-- PMM