[PATCH][ncsi] Revert NCSI link loss/gain commit

[PATCH][ncsi] Revert NCSI link loss/gain commit

[Johnathan Mantey]

The NCSI commit
ncsi: Propagate carrier gain/loss events to the NCSI controller
introduced unwanted behavior.

The intent for the commit was to be able to detect carrier loss/gain
for just the NIC connected to the BMC. The unwanted effect is a
carrier loss for auxiliary paths also causes the BMC to lose
carrier. The BMC never regains carrier despite the secondary NIC
regaining a link.

This change, when merged, needs to be backported to stable kernels.

Signed-off-by: Johnathan Mantey <johnathanx.mantey@intel.com>
---
 net/ncsi/ncsi-aen.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c
index f8854bff286c..62fb1031763d 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -89,11 +89,6 @@ static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp,
 	if ((had_link == has_link) || chained)
 		return 0;
 
-	if (had_link)
-		netif_carrier_off(ndp->ndev.dev);
-	else
-		netif_carrier_on(ndp->ndev.dev);
-
 	if (!ndp->multi_package && !nc->package->multi_channel) {
 		if (had_link) {
 			ndp->flags |= NCSI_DEV_RESHUFFLE;
-- 
2.41.0

Re: [PATCH][ncsi] Revert NCSI link loss/gain commit

[Jakub Kicinski]

On Wed, 8 Nov 2023 14:29:43 -0800 Johnathan Mantey wrote:
> The NCSI commit
> ncsi: Propagate carrier gain/loss events to the NCSI controller
> introduced unwanted behavior.
> 
> The intent for the commit was to be able to detect carrier loss/gain
> for just the NIC connected to the BMC. The unwanted effect is a
> carrier loss for auxiliary paths also causes the BMC to lose
> carrier. The BMC never regains carrier despite the secondary NIC
> regaining a link.
> 
> This change, when merged, needs to be backported to stable kernels.

You need to add a Fixes tag (pointing at the reverted change), 
and a CC: stable tag. Here's an example of a well formatted fix:

https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=02d5fdbf4f2b8c406f7a4c98fa52aa181a11d733

When you repost make sure you use get_maintainers on the patch file, 
to catch all reviewers. And put [PATCH net v2] ncsi: Revert...
as the subject.
-- 
pw-bot: cr