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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-11-21 15:13:10 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-28 13:58:35 -0800 |
| commit | ddc1fd6ac1f3ad3275e19451fb07d2eff249161c (patch) | |
| tree | b7e8512f25e22f8996dfcefbeb31ff6e7e7215e2 /drivers/usb/core/hcd.c | |
| parent | 6372594ac1779261926f2f2c4ef5e79936e4faef (diff) | |
| download | linux-ddc1fd6ac1f3ad3275e19451fb07d2eff249161c.tar.gz linux-ddc1fd6ac1f3ad3275e19451fb07d2eff249161c.tar.bz2 linux-ddc1fd6ac1f3ad3275e19451fb07d2eff249161c.zip | |
USB HCD: avoid duplicate local_irq_disable()
Arnd Bergmann wrote:
usb_hcd_flush_endpoint() has a retry loop that starts with a spin_lock_irq(),
but only gives up the spinlock, not the irq_disable before jumping to the
rescan label.
Alan Stern:
I agree with your sentiment, but it would be better to solve this
problem without using local_irq_disable().
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index fea8256a18d6..d5ed3fa9e304 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1311,8 +1311,8 @@ void usb_hcd_flush_endpoint(struct usb_device *udev, hcd = bus_to_hcd(udev->bus); /* No more submits can occur */ -rescan: spin_lock_irq(&hcd_urb_list_lock); +rescan: list_for_each_entry (urb, &ep->urb_list, urb_list) { int is_in; @@ -1345,6 +1345,7 @@ rescan: usb_put_urb (urb); /* list contents may have changed */ + spin_lock(&hcd_urb_list_lock); goto rescan; } spin_unlock_irq(&hcd_urb_list_lock); |