From 86a2f415e6cdc5dbb2163b31abf4d36f26f7e3da Mon Sep 17 00:00:00 2001 From: Phil Sutter Date: Thu, 14 Jun 2012 01:18:42 +0000 Subject: usbnet: sanitise overlong driver information strings As seen on smsc75xx, driver_info->description being longer than 32 characters messes up 'ethtool -i' output. Signed-off-by: Phil Sutter Signed-off-by: David S. Miller --- drivers/net/usb/usbnet.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/usb/usbnet.c') diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 9f58330f1312..d4f7256a607d 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -876,9 +876,9 @@ void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) { struct usbnet *dev = netdev_priv(net); - strncpy (info->driver, dev->driver_name, sizeof info->driver); - strncpy (info->version, DRIVER_VERSION, sizeof info->version); - strncpy (info->fw_version, dev->driver_info->description, + strlcpy (info->driver, dev->driver_name, sizeof info->driver); + strlcpy (info->version, DRIVER_VERSION, sizeof info->version); + strlcpy (info->fw_version, dev->driver_info->description, sizeof info->fw_version); usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); } -- cgit v1.2.1 From fb13c47b8e5ce707268bd38cfd082da377eac4b7 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Tue, 19 Jun 2012 21:15:51 +0000 Subject: usbnet: clear OPEN flag in failure path Without clearing OPEN flag in failure path, runtime or system resume may submit interrupt/rx URB and start tx queue mistakenly on a interface in DOWN state. Signed-off-by: Ming Lei Acked-by: Oliver Neukum Signed-off-by: David S. Miller --- drivers/net/usb/usbnet.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/net/usb/usbnet.c') diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index d4f7256a607d..815493caea7f 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -796,11 +796,13 @@ int usbnet_open (struct net_device *net) if (info->manage_power) { retval = info->manage_power(dev, 1); if (retval < 0) - goto done; + goto done_manage_power_error; usb_autopm_put_interface(dev->intf); } return retval; +done_manage_power_error: + clear_bit(EVENT_DEV_OPEN, &dev->flags); done: usb_autopm_put_interface(dev->intf); done_nopm: -- cgit v1.2.1 From 5eeb3132eb4c5e9ca92e5247fe4575fe9f8c3efe Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Tue, 19 Jun 2012 21:15:52 +0000 Subject: usbnet: decrease suspend count if returning -EBUSY for runtime suspend This patch decreases dev->suspend_count in the -EBUSY failure path of usbnet_suspend. Without the change, the later runtime suspend will do nothing except for increasing dev->suspend_count. Signed-off-by: Ming Lei Acked-by: Oliver Neukum Signed-off-by: David S. Miller --- drivers/net/usb/usbnet.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/usb/usbnet.c') diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 815493caea7f..1e46f693eb47 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1515,6 +1515,7 @@ int usbnet_suspend (struct usb_interface *intf, pm_message_t message) spin_lock_irq(&dev->txq.lock); /* don't autosuspend while transmitting */ if (dev->txq.qlen && PMSG_IS_AUTO(message)) { + dev->suspend_count--; spin_unlock_irq(&dev->txq.lock); return -EBUSY; } else { -- cgit v1.2.1 From 65841fd5132c3941cdf5df09e70df3ed28323212 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Tue, 19 Jun 2012 21:15:53 +0000 Subject: usbnet: handle remote wakeup asap If usbnet is resumed by remote wakeup, generally there are some packets comming to be handled, so allocate and submit rx URBs in usbnet_resume to avoid delays introduced by tasklet. Otherwise, usbnet may have been runtime suspended before the usbnet_bh is executed to schedule Rx URBs. Without the patch, usbnet can't recieve any packets from peer in runtime suspend state if runtime PM is enabled and autosuspend_delay is set as zero. Signed-off-by: Ming Lei Acked-by: Oliver Neukum Signed-off-by: David S. Miller --- drivers/net/usb/usbnet.c | 42 ++++++++++++++++++++++++++---------------- 1 file changed, 26 insertions(+), 16 deletions(-) (limited to 'drivers/net/usb/usbnet.c') diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 1e46f693eb47..aba769d77459 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1204,6 +1204,21 @@ deferred: } EXPORT_SYMBOL_GPL(usbnet_start_xmit); +static void rx_alloc_submit(struct usbnet *dev, gfp_t flags) +{ + struct urb *urb; + int i; + + /* don't refill the queue all at once */ + for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { + urb = usb_alloc_urb(0, flags); + if (urb != NULL) { + if (rx_submit(dev, urb, flags) == -ENOLINK) + return; + } + } +} + /*-------------------------------------------------------------------------*/ // tasklet (work deferred from completions, in_irq) or timer @@ -1243,26 +1258,14 @@ static void usbnet_bh (unsigned long param) !timer_pending (&dev->delay) && !test_bit (EVENT_RX_HALT, &dev->flags)) { int temp = dev->rxq.qlen; - int qlen = RX_QLEN (dev); - - if (temp < qlen) { - struct urb *urb; - int i; - - // don't refill the queue all at once - for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { - urb = usb_alloc_urb (0, GFP_ATOMIC); - if (urb != NULL) { - if (rx_submit (dev, urb, GFP_ATOMIC) == - -ENOLINK) - return; - } - } + + if (temp < RX_QLEN(dev)) { + rx_alloc_submit(dev, GFP_ATOMIC); if (temp != dev->rxq.qlen) netif_dbg(dev, link, dev->net, "rxqlen %d --> %d\n", temp, dev->rxq.qlen); - if (dev->rxq.qlen < qlen) + if (dev->rxq.qlen < RX_QLEN(dev)) tasklet_schedule (&dev->bh); } if (dev->txq.qlen < TX_QLEN (dev)) @@ -1572,6 +1575,13 @@ int usbnet_resume (struct usb_interface *intf) spin_unlock_irq(&dev->txq.lock); if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { + /* handle remote wakeup ASAP */ + if (!dev->wait && + netif_device_present(dev->net) && + !timer_pending(&dev->delay) && + !test_bit(EVENT_RX_HALT, &dev->flags)) + rx_alloc_submit(dev, GFP_KERNEL); + if (!(dev->txq.qlen >= TX_QLEN(dev))) netif_tx_wake_all_queues(dev->net); tasklet_schedule (&dev->bh); -- cgit v1.2.1