diff options
| author | Clark Wang <xiaoning.wang@nxp.com> | 2024-10-30 17:39:21 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-11-04 10:03:51 +0000 |
| commit | 9e7f2116199d5b88e9fa6375a3b3aba4c6e08895 (patch) | |
| tree | 5d4d8dd4c1aca4b3c7ec12e5b8dafb6071166c78 /drivers/net/ethernet/freescale | |
| parent | b4bfd0a904e9e4b584111374adea72cc5fd83cf4 (diff) | |
net: enetc: optimize the allocation of tx_bdr
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 <xiaoning.wang@nxp.com>
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale')
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 0c7554157006..08477484b974 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; } |