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| author | Vitaly Kuzmichev <vkuzmichev@mvista.com> | 2010-09-22 13:13:55 +0400 |
|---|---|---|
| committer | Remy Bohmer <linux@bohmer.net> | 2010-10-13 12:07:58 +0200 |
| commit | ac5d32d15c3f950d983740aed5403f570ac15c62 (patch) | |
| tree | fd3ddfe97d751ba5969537ffb0b36e9fa27a4acc /drivers/usb/gadget | |
| parent | f2443d10ff3d4b0e3c3eb68ce43d7f26468a1b00 (diff) | |
| download | u-boot-imx-ac5d32d15c3f950d983740aed5403f570ac15c62.zip u-boot-imx-ac5d32d15c3f950d983740aed5403f570ac15c62.tar.gz u-boot-imx-ac5d32d15c3f950d983740aed5403f570ac15c62.tar.bz2 | |
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 <vkuzmichev@mvista.com>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/ether.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c index bc6480c..8f5eec1 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"); } |