From: Vitaly Kuzmichev Date: Wed, 22 Sep 2010 09:13:55 +0000 (+0400) Subject: USB-CDC: Fix tx/rx_req memory leaks X-Git-Tag: v2010.12-rc1~113^2~3 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=ac5d32d15c3f950d983740aed5403f570ac15c62;p=u-boot USB-CDC: Fix tx/rx_req memory leaks Remove and fix needless and destructive operations with tx/rx_req. 1) 'req' in rx_complete is always not NULL and always equals to rx_req 2) Free allocated tx_req if rx_req allocation has failed 3) Do not zero out tx/rx_req in usb_eth_init, leave this for eth_reset_config which will be called at the next use of usb0 4) Additional check in usb_eth_recv is not required Signed-off-by: Vitaly Kuzmichev --- diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c index bc6480c78d..8f5eec1b42 100644 --- a/drivers/usb/gadget/ether.c +++ b/drivers/usb/gadget/ether.c @@ -1276,9 +1276,6 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req) debug("%s: status %d\n", __func__, req->status); packet_received = 1; - - if (req) - dev->rx_req = req; } static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags) @@ -1287,16 +1284,18 @@ static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags) dev->tx_req = usb_ep_alloc_request(dev->in_ep, 0); if (!dev->tx_req) - goto fail; + goto fail1; dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0); if (!dev->rx_req) - goto fail; + goto fail2; return 0; -fail: +fail2: + usb_ep_free_request(dev->in_ep, dev->tx_req); +fail1: error("can't alloc requests"); return -1; } @@ -1791,8 +1790,6 @@ static int usb_eth_init(struct eth_device *netdev, bd_t *bd) } dev->network_started = 0; - dev->tx_req = NULL; - dev->rx_req = NULL; packet_received = 0; packet_sent = 0; @@ -1823,15 +1820,13 @@ static int usb_eth_send(struct eth_device *netdev, volatile void *packet, int length) { int retval; - struct usb_request *req = NULL; struct eth_dev *dev = &l_ethdev; + struct usb_request *req = dev->tx_req; unsigned long ts; unsigned long timeout = USB_CONNECT_TIMEOUT; debug("%s:...\n", __func__); - req = dev->tx_req; - req->buf = (void *)packet; req->context = NULL; req->complete = tx_complete; @@ -1883,8 +1878,7 @@ static int usb_eth_recv(struct eth_device *netdev) NetReceive(NetRxPackets[0], dev->rx_req->length); packet_received = 0; - if (dev->rx_req) - rx_submit(dev, dev->rx_req, 0); + rx_submit(dev, dev->rx_req, 0); } else error("dev->rx_req invalid"); }