lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

USB: straighten out port feature vs. port status usage

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/musb/musb_virthub.c
View File

@ -183,8 +183,8 @@ static void musb_port_reset(struct musb *musb, bool do_reset)
void musb_root_disconnect(struct musb *musb)
{
musb->port1_status = (1 << USB_PORT_FEAT_POWER)
| (1 << USB_PORT_FEAT_C_CONNECTION);
musb->port1_status = USB_PORT_STAT_POWER
| (USB_PORT_STAT_C_CONNECTION << 16);
usb_hcd_poll_rh_status(musb_to_hcd(musb));
musb->is_active = 0;