From: YD Tseng <Yd_Tseng@xxxxxxxxxxxxxx>
Hi Mathias,
This patch works around for parsing extended speed protocol lists.
If the xHCI controller supports USB 3.1 and 3.0 extended speed protocol,
it could show as one 3.1 roothub.
Signed-off-by: YD Tseng <Yd_Tseng@xxxxxxxxxxxxxx>
---
A file is modified.
drivers/usb/host/xhci-mem.c Modified file
diff -up xhci-mem{.orig,} > /tmp/patch
--- xhci-mem.c.orig 2017-04-08 15:35:38.000000000 +0800
+++ xhci-mem.c 2017-05-22 11:56:21.362907677 +0800
@@ -2111,11 +2111,12 @@ static void xhci_add_in_port(struct xhci
{
u32 temp, port_offset, port_count;
int i;
- u8 major_revision;
+ u8 major_revision, minor_revision;
struct xhci_hub *rhub;
temp = readl(addr);
major_revision = XHCI_EXT_PORT_MAJOR(temp);
+ minor_revision = XHCI_EXT_PORT_MINOR(temp);
if (major_revision == 0x03) {
rhub = &xhci->usb3_rhub;
@@ -2129,7 +2130,9 @@ static void xhci_add_in_port(struct xhci
return;
}
rhub->maj_rev = XHCI_EXT_PORT_MAJOR(temp);
- rhub->min_rev = XHCI_EXT_PORT_MINOR(temp);
+
+ if (rhub->min_rev < minor_revision)
+ rhub->min_rev = minor_revision;
/* Port offset and count in the third dword, see section 7.2 */
temp = readl(addr + 2);
@@ -2280,6 +2283,8 @@ static int xhci_setup_port_arrays(struct
offset = cap_start;
+ xhci->usb3_rhub.min_rev = 0;
+ xhci->usb2_rhub.min_rev = 0;
while (offset) {
xhci_add_in_port(xhci, num_ports, base + offset, cap_count);
if (xhci->num_usb2_ports + xhci->num_usb3_ports == num_ports)
--
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