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e1000e: Release mutex lock only if it has been initially acquired 

This patch fixes the issue of unlocking swflag_mutex for 82574 and 82583
devices regardless of if the hw semaphore has been successfully acquired via
e1000_get_hw_semaphore_82574(). With this patch, unlocking mutex now depends
on if the hw semaphore was successfully acquired before. And 82574/82583
devices are reset regardless of whether e1000_get_hw_semaphore_82574()
returns success or failure.

Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Akeem G. Abodunrin 2013-05-02 02:57:44 +00:00 committed by Jeff Kirsher
parent 603cdca980
commit 6c1d8b96d0
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/intel/e1000e/82571.c
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@ -1003,8 +1003,6 @@ static s32 e1000_reset_hw_82571(struct e1000_hw *hw)
default:
break;
}
if (ret_val)
e_dbg("Cannot acquire MDIO ownership\n");
ctrl = er32(CTRL);
@ -1015,7 +1013,9 @@ static s32 e1000_reset_hw_82571(struct e1000_hw *hw)
switch (hw->mac.type) {
case e1000_82574:
case e1000_82583:
e1000_put_hw_semaphore_82574(hw);
/* Release mutex only if the hw semaphore is acquired */
if (!ret_val)
e1000_put_hw_semaphore_82574(hw);
break;
default:
break;