diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2006-10-09 00:08:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-10-17 14:46:32 -0700 |
| commit | a9fc6338bd51a3d5735839e756fe7b741c2e6fad (patch) | |
| tree | 0c75d1739bd65f21b125562dd9f603b1d195dd8c | |
| parent | c41286fd42f3545513f8de9f61028120b6d38e89 (diff) | |
usbnet: add a mutex around phy register access
When working on the mcs7830, I noticed the need for a mutex in its
mdio_read/mdio_write functions. A related problem seems to be present
in the asix driver in the respective functions.
This introduces a mutex in the common usbnet driver and uses it
from the two hardware specific drivers.
Acked-by: David Hollis <dhollis@davehollis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/net/asix.c | 4 | ||||
| -rw-r--r-- | drivers/usb/net/mcs7830.c | 5 | ||||
| -rw-r--r-- | drivers/usb/net/usbnet.c | 1 | ||||
| -rw-r--r-- | drivers/usb/net/usbnet.h | 1 |
4 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/net/asix.c b/drivers/usb/net/asix.c index 5edd0534c7a..881841e600d 100644 --- a/drivers/usb/net/asix.c +++ b/drivers/usb/net/asix.c @@ -569,10 +569,12 @@ static int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) struct usbnet *dev = netdev_priv(netdev); u16 res; + mutex_lock(&dev->phy_mutex); asix_set_sw_mii(dev); asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res); asix_set_hw_mii(dev); + mutex_unlock(&dev->phy_mutex); devdbg(dev, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x", phy_id, loc, le16_to_cpu(res & 0xffff)); @@ -586,10 +588,12 @@ asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) u16 res = cpu_to_le16(val); devdbg(dev, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x", phy_id, loc, val); + mutex_lock(&dev->phy_mutex); asix_set_sw_mii(dev); asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res); asix_set_hw_mii(dev); + mutex_unlock(&dev->phy_mutex); } /* Get the PHY Identifier from the PHYSID1 & PHYSID2 MII registers */ diff --git a/drivers/usb/net/mcs7830.c b/drivers/usb/net/mcs7830.c index 23a80667f17..6240b978fe3 100644 --- a/drivers/usb/net/mcs7830.c +++ b/drivers/usb/net/mcs7830.c @@ -184,6 +184,7 @@ static int mcs7830_read_phy(struct usbnet *dev, u8 index) HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index, }; + mutex_lock(&dev->phy_mutex); /* write the MII command */ ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); if (ret < 0) @@ -208,6 +209,7 @@ static int mcs7830_read_phy(struct usbnet *dev, u8 index) dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n", index, val, i); out: + mutex_unlock(&dev->phy_mutex); return ret; } @@ -222,6 +224,8 @@ static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val) HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F), }; + mutex_lock(&dev->phy_mutex); + /* write the new register contents */ le_val = cpu_to_le16(val); ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val); @@ -248,6 +252,7 @@ static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val) dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n", index, val, i); out: + mutex_unlock(&dev->phy_mutex); return ret; } diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c index decc1b17924..cf3d20eb781 100644 --- a/drivers/usb/net/usbnet.c +++ b/drivers/usb/net/usbnet.c @@ -1144,6 +1144,7 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) dev->delay.function = usbnet_bh; dev->delay.data = (unsigned long) dev; init_timer (&dev->delay); + mutex_init (&dev->phy_mutex); SET_MODULE_OWNER (net); dev->net = net; diff --git a/drivers/usb/net/usbnet.h b/drivers/usb/net/usbnet.h index 743947c3fb8..07c70abbe0e 100644 --- a/drivers/usb/net/usbnet.h +++ b/drivers/usb/net/usbnet.h @@ -30,6 +30,7 @@ struct usbnet { struct usb_device *udev; struct driver_info *driver_info; wait_queue_head_t *wait; + struct mutex phy_mutex; /* i/o info: pipes etc */ unsigned in, out; |