net: libwx: fix alloc msix vectors failed

[ 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@net-swift.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index e078f4071dc23aaf40959ff5a17c466f996007b1..be434c833c69cf117abd5764987697827f63a66a 100644 (file)
--- 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);