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Re: [PATCH] usb-host: workaround libusb bug
From: |
Alex Bennée |
Subject: |
Re: [PATCH] usb-host: workaround libusb bug |
Date: |
Tue, 01 Sep 2020 15:05:52 +0100 |
User-agent: |
mu4e 1.5.5; emacs 28.0.50 |
Gerd Hoffmann <kraxel@redhat.com> writes:
> libusb_get_device_speed() does not work for
> libusb_wrap_sys_device() devices in v1.0.23.
>
> Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1871090
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
> hw/usb/host-libusb.c | 37 ++++++++++++++++++++++++++++++++++++-
> 1 file changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
> index c474551d8456..77f1eaa5fe9e 100644
> --- a/hw/usb/host-libusb.c
> +++ b/hw/usb/host-libusb.c
> @@ -39,6 +39,11 @@
> #endif
> #include <libusb.h>
>
> +#ifdef CONFIG_LINUX
> +#include <sys/ioctl.h>
> +#include <linux/usbdevice_fs.h>
> +#endif
> +
> #include "qapi/error.h"
> #include "migration/vmstate.h"
> #include "monitor/monitor.h"
> @@ -885,6 +890,7 @@ static void usb_host_ep_update(USBHostDevice *s)
> static int usb_host_open(USBHostDevice *s, libusb_device *dev, int hostfd)
> {
> USBDevice *udev = USB_DEVICE(s);
> + int libusb_speed;
> int bus_num = 0;
> int addr = 0;
> int rc;
> @@ -935,7 +941,36 @@ static int usb_host_open(USBHostDevice *s, libusb_device
> *dev, int hostfd)
> usb_ep_init(udev);
> usb_host_ep_update(s);
>
> - udev->speed = speed_map[libusb_get_device_speed(dev)];
> + libusb_speed = libusb_get_device_speed(dev);
> +#ifdef CONFIG_LINUX
> + if (hostfd && libusb_speed == 0) {
> + /*
> + * Workaround libusb bug: libusb_get_device_speed() does not
> + * work for libusb_wrap_sys_device() devices in v1.0.23.
> + *
> + * Speeds are defined in linux/usb/ch9.h, file not included
> + * due to name conflicts.
> + */
> + int rc = ioctl(hostfd, USBDEVFS_GET_SPEED, NULL);
This (further) breaks a bunch of the Travis jobs - I assume because libusb
doesn't
always have this symbol:
Compiling C object libcommon.fa.p/hw_input_vhost-user-input.c.o
../hw/usb/host-libusb.c: In function ‘usb_host_open’:
../hw/usb/host-libusb.c:954:32: error: ‘USBDEVFS_GET_SPEED’ undeclared (first
use in this function)
int rc = ioctl(hostfd, USBDEVFS_GET_SPEED, NULL);
^
../hw/usb/host-libusb.c:954:32: note: each undeclared identifier is reported
only once for each function it appears in
Makefile.ninja:961: recipe for target 'libcommon.fa.p/hw_usb_host-libusb.c.o'
failed
make: *** [libcommon.fa.p/hw_usb_host-libusb.c.o] Error 1
make: *** Waiting for unfinished jobs....
--
Alex Bennée
- Re: [PATCH] usb-host: workaround libusb bug,
Alex Bennée <=