ixgbe: Fill at least min credits to a TC credit refills (3efcb86e) · Commits · 戴 / test

Currently credit_refill and credit_max could be zero for a TC and that is causing Tx hang for CEE mode configuration, so to fix that have at min credit assigned to a TC and that is as what IEEE mode already does. Change-ID: If652c133093a21e530f4e9eab09097976f57fb12 Signed-off-by:

Vasu Dev <vasu.dev@intel.com> Tested-by:

Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by:

Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -139,6 +139,11 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
		/* Calculate credit refill ratio using multiplier */
		credit_refill = min(link_percentage * min_multiplier,
		MAX_CREDIT_REFILL);

		/* Refill at least minimum credit */
		if (credit_refill < min_credit)
		credit_refill = min_credit;

		p->data_credits_refill = (u16)credit_refill;

		/* Calculate maximum credit for the TC */
		@@ -149,7 +154,7 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
		* of a TC is too small, the maximum credit may not be
		* enough to send out a jumbo frame in data plane arbitration.
		*/
		if (credit_max && (credit_max < min_credit))
		if (credit_max < min_credit)
		credit_max = min_credit;

		if (direction == DCB_TX_CONFIG) {

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