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authorVitaly Kuzmichev <vkuzmichev@mvista.com>2010-09-22 13:13:55 +0400
committerRemy Bohmer <linux@bohmer.net>2010-10-13 12:07:58 +0200
commitac5d32d15c3f950d983740aed5403f570ac15c62 (patch)
treefd3ddfe97d751ba5969537ffb0b36e9fa27a4acc /drivers/usb
parentf2443d10ff3d4b0e3c3eb68ce43d7f26468a1b00 (diff)
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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')
-rw-r--r--drivers/usb/gadget/ether.c20
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");
}