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Date: Sat, 8 Mar 2014 01:25:27 -0800 From: Jeff Kirsher <jeffrey.t.kirsher@...el.com> To: davem@...emloft.net Cc: Todd Fujinaka <todd.fujinaka@...el.com>, netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com, Jeff Kirsher <jeffrey.t.kirsher@...el.com> Subject: [net-next 01/15] e1000e: PTP lock in e1000e_phc_adjustfreq From: Todd Fujinaka <todd.fujinaka@...el.com> Add lock in e1000e_phc_adjfreq to prevent concurrent changes to TIMINCA and SYSTIMH/L. Signed-off-by: Todd Fujinaka <todd.fujinaka@...el.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@...el.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com> --- drivers/net/ethernet/intel/e1000e/ptp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c index 065f8c8..e24160d 100644 --- a/drivers/net/ethernet/intel/e1000e/ptp.c +++ b/drivers/net/ethernet/intel/e1000e/ptp.c @@ -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; } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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