6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Duanqiang Wen <duanqiangwen@xxxxxxxxxxxxx>
[ Upstream commit 69197dfc64007b5292cc960581548f41ccd44828 ]
driver needs queue msix vectors and one misc irq vector,
but only queue vectors need irq affinity.
when num_online_cpus is less than chip max msix vectors,
driver will acquire (num_online_cpus + 1) vecotrs, and
call pci_alloc_irq_vectors_affinity functions with affinity
params without setting pre_vectors or post_vectors, it will
cause return error code -ENOSPC.
Misc irq vector is vector 0, driver need to set affinity params
.pre_vectors = 1.
Fixes: 3f703186113f ("net: libwx: Add irq flow functions")
Signed-off-by: Duanqiang Wen <duanqiangwen@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/wangxun/libwx/wx_lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index e078f4071dc23..be434c833c69c 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -1585,7 +1585,7 @@ static void wx_set_num_queues(struct wx *wx)
*/
static int wx_acquire_msix_vectors(struct wx *wx)
{
- struct irq_affinity affd = {0, };
+ struct irq_affinity affd = { .pre_vectors = 1 };
int nvecs, i;
nvecs = min_t(int, num_online_cpus(), wx->mac.max_msix_vectors);
--
2.43.0
