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Revert "xhci: clear usb2 resume related variables in one place."

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This reverts commit 8af9de2a5b which is
commit 0e6275452c upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I460623476ce9205201b40cd2914636abcb91d5d3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2024-04-19 13:43:04 +00:00
parent 09b0a696c5
commit 4e98a48adc
1 changed files with 22 additions and 16 deletions
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38
drivers/usb/host/xhci-hub.c
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@@ -1071,6 +1071,7 @@ static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
struct xhci_bus_state *bus_state;
u32 link_state;
u32 portnum;
int ret;
bus_state = &port->rhub->bus_state;
link_state = portsc & PORT_PLS_MASK;
@@ -1086,30 +1087,23 @@ static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
if (link_state == XDEV_U2)
*status |= USB_PORT_STAT_L1;
if (link_state == XDEV_U0) {
if (port->resume_timestamp)
usb_hcd_end_port_resume(&port->rhub->hcd->self,
portnum);
port->resume_timestamp = 0;
clear_bit(portnum, &bus_state->resuming_ports);
if (bus_state->suspended_ports & (1 << portnum)) {
bus_state->suspended_ports &= ~(1 << portnum);
bus_state->port_c_suspend |= 1 << portnum;
}
}
if (link_state == XDEV_RESUME) {
xhci_handle_usb2_port_link_resume(port, status, portsc,
flags);
ret = xhci_handle_usb2_port_link_resume(port, status,
portsc, flags);
if (ret)
return;
}
}
/*
* Clear usb2 resume signalling variables if port is no longer suspended
* or resuming. Port either resumed to U0/U1/U2, disconnected, or in a
* error state. Resume related variables should be cleared in all those cases.
*/
if ((link_state != XDEV_U3 &&
link_state != XDEV_RESUME) &&
(port->resume_timestamp ||
test_bit(portnum, &bus_state->resuming_ports))) {
port->resume_timestamp = 0;
clear_bit(portnum, &bus_state->resuming_ports);
usb_hcd_end_port_resume(&port->rhub->hcd->self, portnum);
}
}
/*
@@ -1164,6 +1158,18 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd,
else
xhci_get_usb2_port_status(port, &status, raw_port_status,
flags);
/*
* Clear stale usb2 resume signalling variables in case port changed
* state during resume signalling. For example on error
*/
if ((port->resume_timestamp ||
test_bit(wIndex, &bus_state->resuming_ports)) &&
(raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
(raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
port->resume_timestamp = 0;
clear_bit(wIndex, &bus_state->resuming_ports);
usb_hcd_end_port_resume(&hcd->self, wIndex);
}
if (bus_state->port_c_suspend & (1 << wIndex))
status |= USB_PORT_STAT_C_SUSPEND << 16;