diff options
| author |   Bruce Allan <bruce.w.allan@intel.com> | 2011-05-13 07:19:53 +0000 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-06-09 20:32:28 -0700 |
| commit | c5caf4825b22957e4ad70fd94316e91ce8cfb51c (patch) | |
| tree | cdd685b91226fc8ca16bc3d9278dba3e39d88662 | |
| parent | e1000e: 82579 intermittently disabled during S0->Sx (diff) | |
| download | linux-dev-c5caf4825b22957e4ad70fd94316e91ce8cfb51c.tar.xz linux-dev-c5caf4825b22957e4ad70fd94316e91ce8cfb51c.zip | |
e1000e: log when swflag is cleared unexpectedly on ICH/PCH devices
Since EXTCNF_CTRL.SWFLAG (used in the ownership arbitration of shared
resources, e.g. the PHY shared between the s/w, f/w, and h/w clients)
can be cleared by any of those clients, log a debug message when
software attempts to clear it and it is already cleared unexpectedly.
And since the swflag is cleared by a hardware reset, the driver does
not need to do that, but the mutex acquired when the bit is set must
still be cleared.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/e1000e/ich8lan.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index dcd5db5e34e5..dddd0b3dd21b 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -889,8 +889,13 @@ static void e1000_release_swflag_ich8lan(struct e1000_hw *hw) u32 extcnf_ctrl; extcnf_ctrl = er32(EXTCNF_CTRL); - extcnf_ctrl &= ~E1000_EXTCNF_CTRL_SWFLAG; - ew32(EXTCNF_CTRL, extcnf_ctrl); + + if (extcnf_ctrl & E1000_EXTCNF_CTRL_SWFLAG) { + extcnf_ctrl &= ~E1000_EXTCNF_CTRL_SWFLAG; + ew32(EXTCNF_CTRL, extcnf_ctrl); + } else { + e_dbg("Semaphore unexpectedly released by sw/fw/hw\n"); + } mutex_unlock(&swflag_mutex); } @@ -3066,7 +3071,7 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw) msleep(20); if (!ret_val) - e1000_release_swflag_ich8lan(hw); + mutex_unlock(&swflag_mutex); if (ctrl & E1000_CTRL_PHY_RST) { ret_val = hw->phy.ops.get_cfg_done(hw); |