diff options
Diffstat (limited to 'drivers/net/usb/smsc75xx.c')
| -rw-r--r-- | drivers/net/usb/smsc75xx.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index 376143e8a1aa..1f45f7b2fe63 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -756,6 +756,26 @@ static int smsc75xx_set_features(struct net_device *netdev, return 0; } +static int smsc75xx_wait_ready(struct usbnet *dev) +{ + int timeout = 0; + + do { + u32 buf; + int ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); + check_warn_return(ret, "Failed to read PMT_CTL: %d", ret); + + if (buf & PMT_CTL_DEV_RDY) + return 0; + + msleep(10); + timeout++; + } while (timeout < 100); + + netdev_warn(dev->net, "timeout waiting for device ready"); + return -EIO; +} + static int smsc75xx_reset(struct usbnet *dev) { struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); @@ -764,6 +784,9 @@ static int smsc75xx_reset(struct usbnet *dev) netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset"); + ret = smsc75xx_wait_ready(dev); + check_warn_return(ret, "device not ready in smsc75xx_reset"); + ret = smsc75xx_read_reg(dev, HW_CFG, &buf); check_warn_return(ret, "Failed to read HW_CFG: %d", ret); |