diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2010-06-22 16:39:10 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:37 -0700 |
| commit | 541c7d432f76771079e7c295d596ea47cc6a3030 (patch) | |
| tree | 9e04330713366d21849cecf0f3fd2f2c1834574d /drivers/staging | |
| parent | 89ba85d4015b7fa738b35bcc228075c117a9a578 (diff) | |
USB: convert usb_hcd bitfields into atomic flags
This patch (as1393) converts several of the single-bit fields in
struct usb_hcd to atomic flags. This is for safety's sake; not all
CPUs can update bitfield values atomically, and these flags are used
in multiple contexts.
The flag fields that are set only during registration or removal can
remain as they are, since non-atomic accesses at those times will not
cause any problems.
(Strictly speaking, the authorized_default flag should become atomic
as well. I didn't bother with it because it gets changed only via
sysfs. It can be done later, if anyone wants.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/usbip/vhci_hcd.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c index be5d8db98165..0574d848b900 100644 --- a/drivers/staging/usbip/vhci_hcd.c +++ b/drivers/staging/usbip/vhci_hcd.c @@ -215,7 +215,7 @@ static int vhci_hub_status(struct usb_hcd *hcd, char *buf) vhci = hcd_to_vhci(hcd); spin_lock_irqsave(&vhci->lock, flags); - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + if (!HCD_HW_ACCESSIBLE(hcd)) { usbip_dbg_vhci_rh("hw accessible flag in on?\n"); goto done; } @@ -269,7 +269,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u32 prev_port_status[VHCI_NPORTS]; - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) + if (!HCD_HW_ACCESSIBLE(hcd)) return -ETIMEDOUT; /* @@ -1041,7 +1041,7 @@ static int vhci_bus_resume(struct usb_hcd *hcd) dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); spin_lock_irq(&vhci->lock); - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + if (!HCD_HW_ACCESSIBLE(hcd)) { rc = -ESHUTDOWN; } else { /* vhci->rh_state = DUMMY_RH_RUNNING; |