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Date: Mon, 27 May 2013 11:21:44 +0200 From: Richard Cochran <richardcochran@...il.com> To: <netdev@...r.kernel.org> Cc: David Miller <davem@...emloft.net>, <e1000-devel@...ts.sourceforge.net>, Jacob Keller <jacob.e.keller@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com>, Matthew Vick <matthew.vick@...el.com> Subject: [PATCH net-next 3/4] igb: do not clobber the TSAUXC bits on reset. The TSAUXC register has a number of different bits, one of which disables the main clock function. Previously, the clock was re-enabled by clearing the entire register. This patch changes the code to preserve the values of the other bits in that register. Signed-off-by: Richard Cochran <richardcochran@...il.com> --- drivers/net/ethernet/intel/igb/igb_ptp.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index ebc2f72..5944de0 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -860,6 +860,8 @@ void igb_ptp_stop(struct igb_adapter *adapter) void igb_ptp_reset(struct igb_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; + unsigned long flags; + u32 tsauxc; if (!(adapter->flags & IGB_FLAG_PTP)) return; @@ -875,7 +877,11 @@ void igb_ptp_reset(struct igb_adapter *adapter) case e1000_i210: case e1000_i211: /* Enable the timer functions and interrupts. */ - wr32(E1000_TSAUXC, 0x0); + spin_lock_irqsave(&adapter->tmreg_lock, flags); + tsauxc = rd32(E1000_TSAUXC); + tsauxc &= ~TSAUXC_DISABLE; + wr32(E1000_TSAUXC, tsauxc); + spin_unlock_irqrestore(&adapter->tmreg_lock, flags); wr32(E1000_TSIM, TSYNC_INTERRUPTS); wr32(E1000_IMS, E1000_IMS_TS); break; -- 1.7.10.4 -- 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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