From: James Cao <jcao@xxxxxxxxxxx>
Current driver has 6 Rx data URBs. Once any packet received
kernel calls our callback, in which the same URB will be
resubmitted after Rx indication. In URB submission function a new
skb will be allocated since the previous one is passed to upper
layer (freed later). Since the skb is from a special pool (not
regular memory), skb allocation may fail when kernel holds a lot
of Rx packets on some low resource platforms. The URB will not be
resubmitted in this no free skb case. If driver fails to resubmit
all 6 URBs, Rx will stop. To cover this scenario check and
resubmit Rx URBs in main thread.
Signed-off-by: James Cao <jcao@xxxxxxxxxxx>
Signed-off-by: Cathy Luo <cluo@xxxxxxxxxxx>
Signed-off-by: Ganapathi Bhat <gbhat@xxxxxxxxxxx>
---
drivers/net/wireless/marvell/mwifiex/main.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index ee40b73..c78014b 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -247,6 +247,7 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
{
int ret = 0;
unsigned long flags;
+ struct usb_card_rec *usb_card;
spin_lock_irqsave(&adapter->main_proc_lock, flags);
@@ -278,6 +279,16 @@ int mwifiex_main_process(struct mwifiex_adapter *adapter)
break;
}
+ /* Try to resubmit RX URB if sunmission failed earlier */
+ if (!atomic_read(&adapter->rx_pending) &&
+ adapter->iface_type == MWIFIEX_USB) {
+ usb_card = adapter->card;
+ if (atomic_read(&usb_card->rx_data_urb_pending) <
+ MWIFIEX_RX_DATA_URB &&
+ adapter->if_ops.submit_rem_rx_urbs)
+ adapter->if_ops.submit_rem_rx_urbs(adapter);
+ }
+
/* Handle pending interrupt if any */
if (adapter->int_status) {
if (adapter->hs_activated)
--
1.9.1
