Re: [Qemu-devel] [PATCH V1] Re-attach usb device to kernel while usb_host_open fails

[Lin Ma]

在 2015年06月24日 11:53, Gonglei 写道:

On 2015/6/24 11:39, Lin Ma wrote:

Changes in V1:
For avoiding regression issue, Dont remove the usb device from global hostdevs 
list while
usb speed mismatch occurs.

Signed-off-by: Lin Ma <l...@suse.com>
---

The changing remarks should be lay up here,
and use v2 suffix instead of v1.

If you do this, you can add my R-by.
        Reviewed-by: Gonglei <arei.gong...@huawei.com>

Please refer to:
http://wiki.qemu.org/Contribute/SubmitAPatch

Regards,
-Gonglei

I must be getting tired, Sorry about that.

  hw/usb/host-libusb.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index bc2944c..11429f5 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -889,6 +889,9 @@ static int usb_host_open(USBHostDevice *s, libusb_device 
*dev)
  fail:
      trace_usb_host_open_failure(bus_num, addr);
      if (s->dh != NULL) {
+        usb_host_release_interfaces(s);
+        libusb_reset_device(s->dh);
+        usb_host_attach_kernel(s);
          libusb_close(s->dh);
          s->dh = NULL;
          s->dev = NULL;