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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: b3c2dcc4-7e37-4a04-d197-08dcf8c90595 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB8510.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2024 09:55:44.7699 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Pzvj64BcERSAWlYkr1qA93pCJgzY5i1tvAJIXlAcrdXgZG2xyjhYeyyYbFK4SZwKGIf0CZmcswbBYSqb2RftKQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8912 From: Clark Wang There is a situation where num_tx_rings cannot be divided by bdr_int_num. For example, num_tx_rings is 8 and bdr_int_num is 3. According to the previous logic, this results in two tx_bdr corresponding memories not being allocated, so when sending packets to tx ring 6 or 7, wild pointers will be accessed. Of course, this issue doesn't exist on LS1028A, because its num_tx_rings is 8, and bdr_int_num is either 1 or 2. However, there is a risk for the upcoming i.MX95. Therefore, it is necessary to ensure that each tx_bdr can be allocated to the corresponding memory. Signed-off-by: Clark Wang Signed-off-by: Wei Fang Reviewed-by: Claudiu Manoil Reviewed-by: Frank Li --- v6: only add a opening comment in the code --- drivers/net/ethernet/freescale/enetc/enetc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index f292c5ef27b7..89d919c713df 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -3084,10 +3084,10 @@ static void enetc_int_vector_destroy(struct enetc_ndev_priv *priv, int i) int enetc_alloc_msix(struct enetc_ndev_priv *priv) { struct pci_dev *pdev = priv->si->pdev; + int v_tx_rings, v_remainder; int num_stack_tx_queues; int first_xdp_tx_ring; int i, n, err, nvec; - int v_tx_rings; nvec = ENETC_BDR_INT_BASE_IDX + priv->bdr_int_num; /* allocate MSIX for both messaging and Rx/Tx interrupts */ @@ -3101,9 +3101,15 @@ int enetc_alloc_msix(struct enetc_ndev_priv *priv) /* # of tx rings per int vector */ v_tx_rings = priv->num_tx_rings / priv->bdr_int_num; + v_remainder = priv->num_tx_rings % priv->bdr_int_num; for (i = 0; i < priv->bdr_int_num; i++) { - err = enetc_int_vector_init(priv, i, v_tx_rings); + /* Distribute the remaining TX rings to the first v_remainder + * interrupt vectors + */ + int num_tx_rings = i < v_remainder ? v_tx_rings + 1 : v_tx_rings; + + err = enetc_int_vector_init(priv, i, num_tx_rings); if (err) goto fail; }