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Re: [Qemu-devel] [PATCH 06/21] qemu-char: convert parallel backend to da
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 06/21] qemu-char: convert parallel backend to data-driven creation |
Date: |
Mon, 12 Oct 2015 09:13:35 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 10/12/2015 02:03 AM, Paolo Bonzini wrote:
> Conversion to Error * brings better error messages; before:
>
> qemu-system-x86_64: -chardev id=serial,backend=parallel,path=vl.c: Failed
> to create chardev
>
> After:
>
> qemu-system-x86_64: -chardev id=serial,backend=parallel,path=vl.c: not a
> parallel port: Inappropriate ioctl for device
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> qemu-char.c | 28 ++++++++++++++++++----------
> 1 file changed, 18 insertions(+), 10 deletions(-)
>
> +static CharDriverState *qemu_chr_open_pp_fd(int fd, Error **errp)
> {
> CharDriverState *chr;
> ParallelCharDriver *drv;
>
> if (ioctl(fd, PPCLAIM) < 0) {
> close(fd);
> + error_setg_errno(errp, errno, "not a parallel port");
Swap this line with the close(), since close() can clobber errno.
> @@ -4265,11 +4273,9 @@ ChardevReturn *qmp_chardev_add(const char *id,
> ChardevBackend *backend,
> case CHARDEV_BACKEND_KIND_SERIAL:
> abort();
> break;
> -#ifdef HAVE_CHARDEV_PARPORT
> case CHARDEV_BACKEND_KIND_PARALLEL:
> - chr = qmp_chardev_open_parallel(backend->parallel, &local_err);
> + abort();
> break;
Another dead break.
With the error reporting fixed,
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH 02/21] qemu-char: cleanup HAVE_CHARDEV_*, (continued)
- [Qemu-devel] [PATCH 02/21] qemu-char: cleanup HAVE_CHARDEV_*, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 03/21] qemu-char: add create to register_char_driver, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 05/21] qemu-char: convert serial backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 04/21] qemu-char: convert file backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 06/21] qemu-char: convert parallel backend to data-driven creation, Paolo Bonzini, 2015/10/12
- Re: [Qemu-devel] [PATCH 06/21] qemu-char: convert parallel backend to data-driven creation,
Eric Blake <=
- [Qemu-devel] [PATCH 12/21] qemu-char: convert mux backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 09/21] qemu-char: convert UDP backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 13/21] qemu-char: convert msmouse backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 15/21] qemu-char: convert testdev backend to data-driven creation, Paolo Bonzini, 2015/10/12
- [Qemu-devel] [PATCH 16/21] qemu-char: convert stdio backend to data-driven creation, Paolo Bonzini, 2015/10/12