diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2007-08-24 15:42:24 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:55:23 -0700 |
| commit | 4a00027dcb088bf90fa8fb14a7e8ba3506d78f22 (patch) | |
| tree | 992b3dbda7b950b8906ac4751e43a28fd15e2e5d /drivers/usb/core | |
| parent | 9347d51c52afcf1a77d2104f162cf8a085624c83 (diff) | |
USB: Eliminate urb->status usage!
This patch (as979) removes the last vestiges of urb->status from the
host controller drivers and the root-hub emulator. Now the field
doesn't get set until just before the URB's completion routine is
called.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
CC: Olav Kongas <ok@artecdesign.ee>
CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
CC: Tony Olech <tony.olech@elandigitalsystems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/hcd.c | 22 | ||||
| -rw-r--r-- | drivers/usb/core/hcd.h | 3 |
2 files changed, 13 insertions, 12 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 4ac021e42cd..1c5e5d35e08 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -532,7 +532,6 @@ error: /* any errors get returned through the urb completion */ spin_lock_irq(&hcd_root_hub_lock); - urb->status = status; usb_hcd_unlink_urb_from_ep(hcd, urb); /* This peculiar use of spinlocks echoes what real HC drivers do. @@ -540,7 +539,7 @@ error: * RT-friendly. */ spin_unlock(&hcd_root_hub_lock); - usb_hcd_giveback_urb(hcd, urb); + usb_hcd_giveback_urb(hcd, urb, status); spin_lock(&hcd_root_hub_lock); spin_unlock_irq(&hcd_root_hub_lock); @@ -578,13 +577,12 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd) if (urb) { hcd->poll_pending = 0; hcd->status_urb = NULL; - urb->status = 0; urb->actual_length = length; memcpy(urb->transfer_buffer, buffer, length); usb_hcd_unlink_urb_from_ep(hcd, urb); spin_unlock(&hcd_root_hub_lock); - usb_hcd_giveback_urb(hcd, urb); + usb_hcd_giveback_urb(hcd, urb, 0); spin_lock(&hcd_root_hub_lock); } else { length = 0; @@ -677,7 +675,7 @@ static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) usb_hcd_unlink_urb_from_ep(hcd, urb); spin_unlock(&hcd_root_hub_lock); - usb_hcd_giveback_urb(hcd, urb); + usb_hcd_giveback_urb(hcd, urb, status); spin_lock(&hcd_root_hub_lock); } } @@ -1252,6 +1250,7 @@ int usb_hcd_unlink_urb (struct urb *urb, int status) * usb_hcd_giveback_urb - return URB from HCD to device driver * @hcd: host controller returning the URB * @urb: urb being returned to the USB device driver. + * @status: completion status code for the URB. * Context: in_interrupt() * * This hands the URB from HCD to its USB device driver, using its @@ -1260,25 +1259,26 @@ int usb_hcd_unlink_urb (struct urb *urb, int status) * the device driver won't cause problems if it frees, modifies, * or resubmits this URB. * - * If @urb was unlinked, the value of @urb->status will be overridden by + * If @urb was unlinked, the value of @status will be overridden by * @urb->unlinked. Erroneous short transfers are detected in case * the HCD hasn't checked for them. */ -void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb) +void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) { urb->hcpriv = NULL; if (unlikely(urb->unlinked)) - urb->status = urb->unlinked; + status = urb->unlinked; else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && urb->actual_length < urb->transfer_buffer_length && - !urb->status)) - urb->status = -EREMOTEIO; + !status)) + status = -EREMOTEIO; unmap_urb_for_dma(hcd, urb); - usbmon_urb_complete(&hcd->self, urb, urb->status); + usbmon_urb_complete(&hcd->self, urb, status); usb_unanchor_urb(urb); /* pass ownership to the completion handler */ + urb->status = status; urb->complete (urb); atomic_dec (&urb->use_count); if (unlikely (urb->reject)) diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index 729b7a03acd..0fc7b95259f 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h @@ -217,7 +217,8 @@ extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); extern int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags); extern int usb_hcd_unlink_urb (struct urb *urb, int status); -extern void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb); +extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, + int status); extern void usb_hcd_endpoint_disable (struct usb_device *udev, struct usb_host_endpoint *ep); extern int usb_hcd_get_frame_number (struct usb_device *udev); |