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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

drivers/net/ethernet/intel/e1000e/ptp.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

}