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authorRonak Doshi <doshir@vmware.com>2021-12-07 00:17:37 -0800
committerJakub Kicinski <kuba@kernel.org>2021-12-08 17:56:39 -0800
commitf71ef02f1a4a3c49962fa341ad8de19071f0f9bf (patch)
tree45c418477c03cbbf70d9efe280884c76d44b80e9 /drivers/net/vmxnet3/vmxnet3_drv.c
parente195e9b5dee6459d8c8e6a314cc71a644a0537fd (diff)
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>
Diffstat (limited to 'drivers/net/vmxnet3/vmxnet3_drv.c')
-rw-r--r--drivers/net/vmxnet3/vmxnet3_drv.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 14fae317bc70..fd407c0e2856 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;
}