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| author | Hans de Goede <hdegoede@redhat.com> | 2010-11-10 10:06:25 +0100 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2010-11-16 14:35:00 -0600 |
| commit | 2cc59d8cb0ebcfa9cf3476c0528e50478997ab0c (patch) | |
| tree | 75e77787d1b8d4d0dac27d0128961cf126713368 /vl.c | |
| parent | 71d71bbdeb39544ac1602c5e307d9e14c78f9d5d (diff) | |
| download | qemu-2cc59d8cb0ebcfa9cf3476c0528e50478997ab0c.zip qemu-2cc59d8cb0ebcfa9cf3476c0528e50478997ab0c.tar.gz qemu-2cc59d8cb0ebcfa9cf3476c0528e50478997ab0c.tar.bz2 | |
usb-linux: Get the active configuration from sysfs rather then asking the dev
Some devices seem to choke on receiving a USB_REQ_GET_CONFIGURATION ctrl msg
(witnessed with a digital picture frame usb id 1908:1320).
When usb_fs_type == USB_FS_SYS, the active configuration can be read directly
from sysfs, which allows using this device through qemu's usb redirection.
More in general it seems a good idea to not send needless control msg's to
devices, esp. as the code in question is called every time a set_interface
is done. Which happens multiple times during virtual machine startup, and
when device drivers are activating the usb device.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'vl.c')
0 files changed, 0 insertions, 0 deletions