Hello.
On 20-06-2012 11:15, Ming Lei wrote:
If usbnet is resumed by remote wakeup, generally there are
some packets comming to be handled, so allocate and submit
rx URBs in usbnet_resume to avoid delays introduced by tasklet.
Otherwise, usbnet may have been runtime suspended before the
usbnet_bh is executed to schedule Rx URBs.
Without the patch, usbnet can't recieve any packets from peer
in runtime suspend state if runtime PM is enabled and
autosuspend_delay is set as zero.
Signed-off-by: Ming Lei<ming.lei@xxxxxxxxxxxxx>
---
drivers/net/usb/usbnet.c | 42 ++++++++++++++++++++++++++----------------
1 file changed, 26 insertions(+), 16 deletions(-)
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 9bfa775..a89d6c5 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1201,6 +1201,21 @@ deferred:
}
EXPORT_SYMBOL_GPL(usbnet_start_xmit);
+static void rx_alloc_submit(struct usbnet *dev, gfp_t flags)
+{
+ struct urb *urb;
+ int i;
+
+ /* don't refill the queue all at once */
+ for (i = 0; i< 10&& dev->rxq.qlen< RX_QLEN(dev); i++) {
+ urb = usb_alloc_urb(0, flags);
+ if (urb != NULL) {
+ if (rx_submit(dev, urb, flags) == -ENOLINK)
The above 2 *if* statements can be collapsed into single one.
+ return;
+ }
+ }
+}
+
WBR, Sergei
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
