Commit 6c2ed39c authored by Todd Fujinaka's avatar Todd Fujinaka Committed by Jeff Kirsher
Browse files

e1000e: PTP lock in e1000e_phc_adjustfreq



Add lock in e1000e_phc_adjfreq to prevent concurrent changes to TIMINCA
and SYSTIMH/L.
Signed-off-by: default avatarTodd Fujinaka <todd.fujinaka@intel.com>
Tested-by: default avatarJeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 37147652
......@@ -47,6 +47,7 @@ static int e1000e_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
ptp_clock_info);
struct e1000_hw *hw = &adapter->hw;
bool neg_adj = false;
unsigned long flags;
u64 adjustment;
u32 timinca, incvalue;
s32 ret_val;
......@@ -64,6 +65,8 @@ static int e1000e_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
if (ret_val)
return ret_val;
spin_lock_irqsave(&adapter->systim_lock, flags);
incvalue = timinca & E1000_TIMINCA_INCVALUE_MASK;
adjustment = incvalue;
......@@ -77,6 +80,8 @@ static int e1000e_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
ew32(TIMINCA, timinca);
spin_unlock_irqrestore(&adapter->systim_lock, flags);
return 0;
}
......
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