bnxt_en: Fix DCB ETS validation

[ Upstream commit b74c2a2e9cc471e847abd87e50a2354c07e02040 ]

In bnxt_ets_validate(), the code incorrectly loops over all possible
traffic classes to check and add the ETS settings.  Fix it to loop
over the configured traffic classes only.

The unconfigured traffic classes will default to TSA_ETS with 0
bandwidth.  Looping over these unconfigured traffic classes may
cause the validation to fail and trigger this error message:

"rejecting ETS config starving a TC\n"

The .ieee_setets() will then fail.

Fixes: 7df4ae9fe855 ("bnxt_en: Implement DCBNL to support host-based DCBX.")
Reviewed-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Shravya KN <shravya.k-n@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250710213938.1959625-2-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
index b1511bcffb1bbf7160254ea985a8eef13453aca7..5e6305f8220f6a852194ff118bb3b429af97a7a6 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
@@ -454,7 +454,9 @@ static int bnxt_ets_validate(struct bnxt *bp, struct ieee_ets *ets, u8 *tc)
 
                if ((ets->tc_tx_bw[i] || ets->tc_tsa[i]) && i > bp->max_tc)
                        return -EINVAL;
+       }
 
+       for (i = 0; i < max_tc; i++) {
                switch (ets->tc_tsa[i]) {
                case IEEE_8021QAZ_TSA_STRICT:
                        break;