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Fix issue with Linux guest XHCI tablet probing.

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The USB3 spec mandates that the	device-descriptor max packet size
be 512 bytes, which requires a field size of 9 since it	is a
power-of-2.

Linux kernels recently started validating this field, resulting	in
the table not being probed and the cursor not working in bhyve VNC.

PR:		275760

(cherry picked from commit 0c243cd4a3671bf728f33378ac593c08d8367bc2)
This commit is contained in:
Peter Grehan 2024-01-14 21:27:12 +10:00
parent 55210b704a
commit 2ee407b606
1 changed files with 1 additions and 1 deletions
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2
usr.sbin/bhyve/usb_mouse.c
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@ -154,7 +154,7 @@ static struct usb_device_descriptor umouse_dev_desc = {
.bLength = sizeof(umouse_dev_desc),
.bDescriptorType = UDESC_DEVICE,
MSETW(.bcdUSB, UD_USB_3_0),
.bMaxPacketSize = 8, /* max packet size */
.bMaxPacketSize = 9, /* max pkt size, 2^9 = 512 */
MSETW(.idVendor, 0xFB5D), /* vendor */
MSETW(.idProduct, 0x0001), /* product */
MSETW(.bcdDevice, 0), /* device version */