> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Sent: 2024年4月30日 18:38
> To: stable@xxxxxxxxxxxxxxx
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>;
> patches@xxxxxxxxxxxxxxx; Duanqiang Wen <duanqiangwen@xxxxxxxxxxxxx>;
> David S. Miller <davem@xxxxxxxxxxxxx>; Sasha Levin <sashal@xxxxxxxxxx>
> Subject: [PATCH 6.6 044/186] net: libwx: fix alloc msix vectors failed
>
> 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
>
This patch in kernel-6.6 and kernel 6.7 will cause problems. In kernel-6.6
and kernel 6.7,
Wangxun txgbe & ngbe driver adjust misc irq to vector 0 not yet. How to
revert it in
kernel-6.6 and kernel-6.7 stable?>
>
