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| 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/usb/gadget | |
| parent | 89ba85d4015b7fa738b35bcc228075c117a9a578 (diff) | |
| download | op-kernel-dev-541c7d432f76771079e7c295d596ea47cc6a3030.zip op-kernel-dev-541c7d432f76771079e7c295d596ea47cc6a3030.tar.gz | |
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/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/dummy_hcd.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c index 4f9e578..dc65462 100644 --- a/drivers/usb/gadget/dummy_hcd.c +++ b/drivers/usb/gadget/dummy_hcd.c @@ -1542,7 +1542,7 @@ static int dummy_hub_status (struct usb_hcd *hcd, char *buf) dum = hcd_to_dummy (hcd); spin_lock_irqsave (&dum->lock, flags); - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) + if (!HCD_HW_ACCESSIBLE(hcd)) goto done; if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { @@ -1588,7 +1588,7 @@ static int dummy_hub_control ( int retval = 0; unsigned long flags; - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) + if (!HCD_HW_ACCESSIBLE(hcd)) return -ETIMEDOUT; dum = hcd_to_dummy (hcd); @@ -1739,7 +1739,7 @@ static int dummy_bus_resume (struct usb_hcd *hcd) dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); spin_lock_irq (&dum->lock); - if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + if (!HCD_HW_ACCESSIBLE(hcd)) { rc = -ESHUTDOWN; } else { dum->rh_state = DUMMY_RH_RUNNING; |
