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ixgbe/base: fix Tx hang in CEE mode

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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.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
This commit is contained in:
Wenzhuo Lu 2015-11-20 15:17:53 +08:00 committed by Thomas Monjalon
parent 8487a24edc
commit b7fbe1a801
1 changed files with 6 additions and 3 deletions
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9
drivers/net/ixgbe/base/ixgbe_dcb.c
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@ -147,6 +147,11 @@ s32 ixgbe_dcb_calculate_tc_credits_cee(struct ixgbe_hw *hw,
/* Calculate credit refill ratio using multiplier */
credit_refill = min(link_percentage * min_multiplier,
(u32)IXGBE_DCB_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 */
@ -157,7 +162,7 @@ s32 ixgbe_dcb_calculate_tc_credits_cee(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 == IXGBE_DCB_TX_CONFIG) {
@ -369,8 +374,6 @@ s32 ixgbe_dcb_check_config_cee(struct ixgbe_dcb_config *dcb_config)
}
err_config:
DEBUGOUT2("DCB error code %d while checking %s settings.\n",
ret_val, (i == IXGBE_DCB_TX_CONFIG) ? "Tx" : "Rx");
return ret_val;
}