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USB: straighten out port feature vs. port status usage

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This patch (as1349b) clears up the confusion in many USB host
controller drivers between port features and port statuses.  In mosty
cases it's true that the status bit is in the position given by the
corresponding feature value, but that's not always true and it's not
guaranteed in the USB spec.

There's no functional change, just replacing expressions of the form
(1 << USB_PORT_FEAT_x) with USB_PORT_STAT_x, which has the same value.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2010-03-04 17:05:08 -05:00
committed by Greg Kroah-Hartman
parent 288ead45fa
commit 749da5f82f
10 changed files with 89 additions and 90 deletions
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16
drivers/usb/host/xhci-hub.c
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@@ -205,27 +205,27 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
/* wPortChange bits */
if (temp & PORT_CSC)
status |= 1 << USB_PORT_FEAT_C_CONNECTION;
status |= USB_PORT_STAT_C_CONNECTION << 16;
if (temp & PORT_PEC)
status |= 1 << USB_PORT_FEAT_C_ENABLE;
status |= USB_PORT_STAT_C_ENABLE << 16;
if ((temp & PORT_OCC))
status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
status |= USB_PORT_STAT_C_OVERCURRENT << 16;
/*
* FIXME ignoring suspend, reset, and USB 2.1/3.0 specific
* changes
*/
if (temp & PORT_CONNECT) {
status |= 1 << USB_PORT_FEAT_CONNECTION;
status |= USB_PORT_STAT_CONNECTION;
status |= xhci_port_speed(temp);
}
if (temp & PORT_PE)
status |= 1 << USB_PORT_FEAT_ENABLE;
status |= USB_PORT_STAT_ENABLE;
if (temp & PORT_OC)
status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
status |= USB_PORT_STAT_OVERCURRENT;
if (temp & PORT_RESET)
status |= 1 << USB_PORT_FEAT_RESET;
status |= USB_PORT_STAT_RESET;
if (temp & PORT_POWER)
status |= 1 << USB_PORT_FEAT_POWER;
status |= USB_PORT_STAT_POWER;
xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
put_unaligned(cpu_to_le32(status), (__le32 *) buf);
break;