From a170f2c7973728f2e9e1b66214b0c14062c78398 Mon Sep 17 00:00:00 2001
From: Stefano Babic <sbabic@denx.de>
Date: Sun, 15 Aug 2010 14:19:00 +0200
Subject: [PATCH] USB-CDC: called handle_interrupts inside usb_eth_send
The patch removes an endless loop in the usb_eth_send
if the tx_complete is not called before going
in the loop. The driver interrupt routine is called
allowing the driver to check if the TX is completed.
Signed-off-by: Stefano Babic <sbabic@denx.de>
---
drivers/usb/gadget/ether.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 9fc6a369c3..2965299474 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1801,6 +1801,8 @@ static int usb_eth_send(struct eth_device* netdev, volatile void* packet, int le
int retval;
struct usb_request *req = NULL;
struct eth_dev *dev = &l_ethdev;
+ unsigned long ts;
+ unsigned long timeout = USB_CONNECT_TIMEOUT;
debug("%s:...\n", __func__);
@@ -1826,6 +1828,8 @@ static int usb_eth_send(struct eth_device* netdev, volatile void* packet, int le
? ((dev->tx_qlen % qmult) != 0) : 0;
#endif
dev->tx_qlen=1;
+ ts = get_timer(0);
+ packet_sent = 0;
retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
@@ -1833,7 +1837,11 @@ static int usb_eth_send(struct eth_device* netdev, volatile void* packet, int le
debug("%s: packet queued\n", __func__);
while(!packet_sent)
{
- packet_sent=0;
+ if (get_timer(ts) > timeout) {
+ printf("timeout sending packets to usb ethernet\n");
+ return -1;
+ }
+ usb_gadget_handle_interrupts();
}
return 0;
--
2.39.5