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Code Issues Releases Wiki Activity

bnxt_en: Fix TX ring indexing logic

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Two spots were missed when modifying the TX ring indexing logic.
The use of unmasked TX index in bnxt_tx_int() will cause unnecessary
__bnxt_tx_int() calls.  The same issue in bnxt_tx_int_xdp() can
result in illegal array index.

Fixes: 6d1add9553 ("bnxt_en: Modify TX ring indexing logic.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231212005122.2401-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Michael Chan 2023-12-11 16:51:12 -08:00 committed by Jakub Kicinski
parent 7fb17a0c18
commit 18fe0a383c
2 changed files with 2 additions and 2 deletions
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2
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View file

@ -781,7 +781,7 @@ static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int budget)
int i;
bnxt_for_each_napi_tx(i, bnapi, txr) {
if (txr->tx_hw_cons != txr->tx_cons)
if (txr->tx_hw_cons != RING_TX(bp, txr->tx_cons))
__bnxt_tx_int(bp, txr, budget);
}
bnapi->events &= ~BNXT_TX_CMP_EVENT;

2
drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
View file

@ -173,7 +173,7 @@ void bnxt_tx_int_xdp(struct bnxt *bp, struct bnxt_napi *bnapi, int budget)
bnapi->events &= ~BNXT_TX_CMP_EVENT;
WRITE_ONCE(txr->tx_cons, tx_cons);
if (rx_doorbell_needed) {
tx_buf = &txr->tx_buf_ring[last_tx_cons];
tx_buf = &txr->tx_buf_ring[RING_TX(bp, last_tx_cons)];
bnxt_db_write(bp, &rxr->rx_db, tx_buf->rx_prod);
}