linux-kernel - Re: ACPI IRQ storm with 6.10

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Message-ID: <20240819164739.GA160626@bhelgaas>
Date: Mon, 19 Aug 2024 11:47:39 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Jiri Slaby <jirislaby@...nel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>, Len Brown <lenb@...nel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Linux regressions mailing list <regressions@...ts.linux.dev>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	przemyslaw.kitszel@...el.com, intel-wired-lan@...ts.osuosl.org,
	jesse.brandeburg@...el.com, "Rafael J. Wysocki" <rafael@...nel.org>,
	Petr Valenta <petr@...klidu.cz>
Subject: Re: ACPI IRQ storm with 6.10

On Mon, Aug 19, 2024 at 07:23:42AM +0200, Jiri Slaby wrote:
> On 19. 08. 24, 6:50, Jiri Slaby wrote:
> > CC e1000e guys + Jesse (due to 75a3f93b5383) + Bjorn (due to b2c289415b2b)
> 
> Bjorn,
> 
> I am confused by these changes:
> ==========================================
> @@ -291,16 +288,13 @@ static int e1000_set_link_ksettings(struct net_device
> *net
> dev,
>          * duplex is forced.
>          */
>         if (cmd->base.eth_tp_mdix_ctrl) {
> -               if (hw->phy.media_type != e1000_media_type_copper) {
> -                       ret_val = -EOPNOTSUPP;
> -                       goto out;
> -               }
> +               if (hw->phy.media_type != e1000_media_type_copper)
> +                       return -EOPNOTSUPP;
> 
>                 if ((cmd->base.eth_tp_mdix_ctrl != ETH_TP_MDI_AUTO) &&
>                     (cmd->base.autoneg != AUTONEG_ENABLE)) {
>                         e_err("forcing MDI/MDI-X state is not supported when
> lin
> k speed and/or duplex are forced\n");
> -                       ret_val = -EINVAL;
> -                       goto out;
> +                       return -EINVAL;
>                 }
>         }
> 
> @@ -347,7 +341,6 @@ static int e1000_set_link_ksettings(struct net_device
> *netde
> v,
>         }
> 
>  out:
> -       pm_runtime_put_sync(netdev->dev.parent);
>         clear_bit(__E1000_RESETTING, &adapter->state);
>         return ret_val;
>  }
> ==========================================
> 
> So no more clear_bit(__E1000_RESETTING in the above fail paths. Is that
> intentional?

No, not intentional, looks like I just blew it, sorry.  Will post a
fix soon.  Thanks a lot for debugging this.

Bjorn