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USB: xhci: Remove the arbitrary limit of 15 xHCI ports

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Our virtual xHCI device can have as many ports as we like - I've tested
this patch with 31.

Signed-off-by: William Gulland <wgulland@vmware.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
William Gulland 2010-05-12 10:20:34 -07:00 committed by Greg Kroah-Hartman
parent 22b4b6113e
commit 419a8e8168
1 changed files with 3 additions and 12 deletions
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15
drivers/usb/host/xhci-hub.c
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@ -298,7 +298,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
* Returns 0 if the status hasn't changed, or the number of bytes in buf.
* Ports are 0-indexed from the HCD point of view,
* and 1-indexed from the USB core pointer of view.
* xHCI instances can have up to 127 ports, so FIXME if you see more than 15.
*
* Note that the status change bits will be cleared as soon as a port status
* change event is generated, so we use the saved status from that event.
@ -315,14 +314,9 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
ports = HCS_MAX_PORTS(xhci->hcs_params1);
/* Initial status is no changes */
buf[0] = 0;
retval = (ports + 8) / 8;
memset(buf, 0, retval);
status = 0;
if (ports > 7) {
buf[1] = 0;
retval = 2;
} else {
retval = 1;
}
spin_lock_irqsave(&xhci->lock, flags);
/* For each port, did anything change? If so, set that bit in buf. */
@ -331,10 +325,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
NUM_PORT_REGS*i;
temp = xhci_readl(xhci, addr);
if (temp & (PORT_CSC | PORT_PEC | PORT_OCC)) {
if (i < 7)
buf[0] |= 1 << (i + 1);
else
buf[1] |= 1 << (i - 7);
buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
status = 1;
}
}