diff options
| author | Enric Balletbo i Serra <eballetbo@iseebcn.com> | 2011-04-05 06:52:49 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-04-06 12:23:12 -0700 |
| commit | 35a67edf3570e9b44c34965dd52a6b7f845fb40f (patch) | |
| tree | ef1be41308633817ed93683ed171458c626c7eae | |
| parent | 9d9305949778c41b92d4394a2f2a6bcdb1c41a9c (diff) | |
smsc911x: fix mac_lock acquision before calling smsc911x_mac_read
When SMSC911X_SAVE_MAC_ADDRESS flag is enabled the driver calls
smsc911x_mac_read and smsc911x_mac_read function without acquiring mac_lock
spinlock
This patch fixes following warning
smsc911x: Driver version 2008-10-21.
------------[ cut here ]------------
WARNING: at drivers/net/smsc911x.c:261 smsc911x_mac_read+0x24/0x220()
Modules linked in:
[<c0060858>] (unwind_backtrace+0x0/0xe0) from [<c009322c>] (warn_slowpath_common+0x4c/0x64)
[<c009322c>] (warn_slowpath_common+0x4c/0x64) from [<c009325c>] (warn_slowpath_null+0x18/0x1c)
[<c009325c>] (warn_slowpath_null+0x18/0x1c) from [<c0324bec>] (smsc911x_mac_read+0x24/0x220)
[<c0324bec>] (smsc911x_mac_read+0x24/0x220) from [<c0434788>] (smsc911x_read_mac_address+0x18/0x6c)
[<c0434788>] (smsc911x_read_mac_address+0x18/0x6c) from [<c0434c74>] (smsc911x_drv_probe+0x498/0x1788)
[<c0434c74>] (smsc911x_drv_probe+0x498/0x1788) from [<c02d3e54>] (platform_drv_probe+0x14/0x18)
[<c02d3e54>] (platform_drv_probe+0x14/0x18) from [<c02d2d60>] (driver_probe_device+0xc8/0x184)
[<c02d2d60>] (driver_probe_device+0xc8/0x184) from [<c02d2e84>] (__driver_attach+0x68/0x8c)
[<c02d2e84>] (__driver_attach+0x68/0x8c) from [<c02d1fc8>] (bus_for_each_dev+0x48/0x74)
[<c02d1fc8>] (bus_for_each_dev+0x48/0x74) from [<c02d2660>] (bus_add_driver+0x9c/0x228)
[<c02d2660>] (bus_add_driver+0x9c/0x228) from [<c02d3598>] (driver_register+0xa0/0x124)
[<c02d3598>] (driver_register+0xa0/0x124) from [<c0050668>] (do_one_initcall+0x94/0x168)
[<c0050668>] (do_one_initcall+0x94/0x168) from [<c0008984>] (kernel_init+0xa0/0x154)
[<c0008984>] (kernel_init+0xa0/0x154) from [<c005afac>] (kernel_thread_exit+0x0/0x8)
---[ end trace 2c931a35b7885770 ]---
Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/smsc911x.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c index 1566259c1f2..4747846eb4f 100644 --- a/drivers/net/smsc911x.c +++ b/drivers/net/smsc911x.c @@ -1818,6 +1818,7 @@ static int __devinit smsc911x_init(struct net_device *dev) SMSC_TRACE(PROBE, "PHY will be autodetected."); spin_lock_init(&pdata->dev_lock); + spin_lock_init(&pdata->mac_lock); if (pdata->ioaddr == 0) { SMSC_WARNING(PROBE, "pdata->ioaddr: 0x00000000"); @@ -1895,8 +1896,11 @@ static int __devinit smsc911x_init(struct net_device *dev) /* workaround for platforms without an eeprom, where the mac address * is stored elsewhere and set by the bootloader. This saves the * mac address before resetting the device */ - if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) + if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { + spin_lock_irq(&pdata->mac_lock); smsc911x_read_mac_address(dev); + spin_unlock_irq(&pdata->mac_lock); + } /* Reset the LAN911x */ if (smsc911x_soft_reset(pdata)) @@ -2059,8 +2063,6 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev) SMSC_TRACE(PROBE, "Network interface: \"%s\"", dev->name); } - spin_lock_init(&pdata->mac_lock); - retval = smsc911x_mii_init(pdev, dev); if (retval) { SMSC_WARNING(PROBE, |