diff options
| author | Denis Kirjanov <dkirjanov@kernel.org> | 2010-09-14 20:58:46 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-15 17:32:39 -0400 |
| commit | 84176b7b56704580e008e6cb820dd4ccf622a1fd (patch) | |
| tree | e4a55028c485f3d48ee3ec2a051fb972f8d1899c /drivers/mfd/twl-core.c | |
| parent | 01f83d69844d307be2aa6fea88b0e8fe5cbdb2f4 (diff) | |
3c59x: Remove atomic context inside vortex_{set|get}_wol
There is no need to use spinlocks in vortex_{set|get}_wol.
This also fixes a bug:
[ 254.214993] 3c59x 0000:00:0d.0: PME# enabled
[ 254.215021] BUG: sleeping function called from invalid context at kernel/mutex.c:94
[ 254.215030] in_atomic(): 0, irqs_disabled(): 1, pid: 4875, name: ethtool
[ 254.215042] Pid: 4875, comm: ethtool Tainted: G W 2.6.36-rc3+ #7
[ 254.215049] Call Trace:
[ 254.215050] [] __might_sleep+0xb1/0xb6
[ 254.215050] [] mutex_lock+0x17/0x30
[ 254.215050] [] acpi_enable_wakeup_device_power+0x2b/0xb1
[ 254.215050] [] acpi_pm_device_sleep_wake+0x42/0x7f
[ 254.215050] [] acpi_pci_sleep_wake+0x5d/0x63
[ 254.215050] [] platform_pci_sleep_wake+0x1d/0x20
[ 254.215050] [] __pci_enable_wake+0x90/0xd0
[ 254.215050] [] acpi_set_WOL+0x8e/0xf5 [3c59x]
[ 254.215050] [] vortex_set_wol+0x4e/0x5e [3c59x]
[ 254.215050] [] dev_ethtool+0x1cf/0xb61
[ 254.215050] [] ? debug_mutex_free_waiter+0x45/0x4a
[ 254.215050] [] ? __mutex_lock_common+0x204/0x20e
[ 254.215050] [] ? __mutex_lock_slowpath+0x12/0x15
[ 254.215050] [] ? mutex_lock+0x23/0x30
[ 254.215050] [] dev_ioctl+0x42c/0x533
[ 254.215050] [] ? _cond_resched+0x8/0x1c
[ 254.215050] [] ? lock_page+0x1c/0x30
[ 254.215050] [] ? page_address+0x15/0x7c
[ 254.215050] [] ? filemap_fault+0x187/0x2c4
[ 254.215050] [] sock_ioctl+0x1d4/0x1e0
[ 254.215050] [] ? sock_ioctl+0x0/0x1e0
[ 254.215050] [] vfs_ioctl+0x19/0x33
[ 254.215050] [] do_vfs_ioctl+0x424/0x46f
[ 254.215050] [] ? selinux_file_ioctl+0x3c/0x40
[ 254.215050] [] sys_ioctl+0x40/0x5a
[ 254.215050] [] sysenter_do_call+0x12/0x22
vortex_set_wol protected with a spinlock, but nested acpi_set_WOL acquires a mutex inside atomic context.
Ethtool operations are already serialized by RTNL mutex, so it is safe to drop the locks.
Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/mfd/twl-core.c')
0 files changed, 0 insertions, 0 deletions