diff options
| author | Ronak Doshi <doshir@vmware.com> | 2021-12-07 00:17:37 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-08 17:56:39 -0800 |
| commit | f71ef02f1a4a3c49962fa341ad8de19071f0f9bf (patch) | |
| tree | 45c418477c03cbbf70d9efe280884c76d44b80e9 | |
| parent | e195e9b5dee6459d8c8e6a314cc71a644a0537fd (diff) | |
| download | linux-misc-f71ef02f1a4a3c49962fa341ad8de19071f0f9bf.tar.gz | |
vmxnet3: fix minimum vectors alloc issue
'Commit 39f9895a00f4 ("vmxnet3: add support for 32 Tx/Rx queues")'
added support for 32Tx/Rx queues. Within that patch, value of
VMXNET3_LINUX_MIN_MSIX_VECT was updated.
However, there is a case (numvcpus = 2) which actually requires 3
intrs which matches VMXNET3_LINUX_MIN_MSIX_VECT which then is
treated as failure by stack to allocate more vectors. This patch
fixes this issue.
Fixes: 39f9895a00f4 ("vmxnet3: add support for 32 Tx/Rx queues")
Signed-off-by: Ronak Doshi <doshir@vmware.com>
Acked-by: Guolin Yang <gyang@vmware.com>
Link: https://lore.kernel.org/r/20211207081737.14000-1-doshir@vmware.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/vmxnet3/vmxnet3_drv.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index 14fae317bc70f..fd407c0e28569 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -3261,7 +3261,7 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) #ifdef CONFIG_PCI_MSI if (adapter->intr.type == VMXNET3_IT_MSIX) { - int i, nvec; + int i, nvec, nvec_allocated; nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ? 1 : adapter->num_tx_queues; @@ -3274,14 +3274,15 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) for (i = 0; i < nvec; i++) adapter->intr.msix_entries[i].entry = i; - nvec = vmxnet3_acquire_msix_vectors(adapter, nvec); - if (nvec < 0) + nvec_allocated = vmxnet3_acquire_msix_vectors(adapter, nvec); + if (nvec_allocated < 0) goto msix_err; /* If we cannot allocate one MSIx vector per queue * then limit the number of rx queues to 1 */ - if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) { + if (nvec_allocated == VMXNET3_LINUX_MIN_MSIX_VECT && + nvec != VMXNET3_LINUX_MIN_MSIX_VECT) { if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE || adapter->num_rx_queues != 1) { adapter->share_intr = VMXNET3_INTR_TXSHARE; @@ -3291,14 +3292,14 @@ vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) } } - adapter->intr.num_intrs = nvec; + adapter->intr.num_intrs = nvec_allocated; return; msix_err: /* If we cannot allocate MSIx vectors use only one rx queue */ dev_info(&adapter->pdev->dev, "Failed to enable MSI-X, error %d. " - "Limiting #rx queues to 1, try MSI.\n", nvec); + "Limiting #rx queues to 1, try MSI.\n", nvec_allocated); adapter->intr.type = VMXNET3_IT_MSI; } |