linux-kernel - Re: [PATCH] e1000: Fix regression: garbled stats and irq allocation during swsusp

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Message-Id: <200611041620.35712.toralf.foerster@gmx.de>
Date:	Sat, 4 Nov 2006 16:20:32 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	Auke Kok <auke-jan.h.kok@...el.com>
Cc:	torvalds@...l.org, linux-kernel@...r.kernel.org, greg@...ah.com,
	stable@...r.kernel.org, rjw@...k.pl, bunk@...sta.de, akpm@...l.org,
	laurent.riffard@...e.fr, rajesh.shah@...el.com, jeff@...zik.org,
	pavel@....cz, jesse.brandeburg@...el.com,
	"Ronciak, John" <john.ronciak@...el.com>,
	"John W. Linville" <linville@...driver.com>, nhorman@...hat.com,
	cluebot@...orafaq.org, notting@...hat.com, bruce.w.allan@...el.com,
	davej@...hat.com, linville@...hat.com, wtogami@...hat.com,
	dag@...ers.com, error27@...il.com,
	e1000-list <e1000-devel@...ts.sourceforge.net>
Subject: Re: [PATCH] e1000: Fix regression: garbled stats and irq allocation during swsusp

Hi Auke,

good news. I incorporated the changes manually b/cI couldn't apply your patch
against the latest git tree from Linux with the program patch.
The patch would solve http://bugzilla.kernel.org/show_bug.cgi?id=7207 :-)
Here's the diff after my edit of the file e1000_main.c:

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 8d04752..400bdee 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -4799,7 +4799,8 @@ e1000_suspend(struct pci_dev *pdev, pm_m

        if (adapter->hw.phy_type == e1000_phy_igp_3)
                e1000_phy_powerdown_workaround(&adapter->hw);
-
+       e1000_free_irq(adapter);
+
        /* Release control of h/w to f/w.  If f/w is AMT enabled, this
         * would have already happened in close and is redundant. */
        e1000_release_hw_control(adapter);
@@ -4830,6 +4831,10 @@ e1000_resume(struct pci_dev *pdev)
        pci_enable_wake(pdev, PCI_D3hot, 0);
        pci_enable_wake(pdev, PCI_D3cold, 0);

+       if ((err = e1000_request_irq(adapter)))
+               return err;
+
+       e1000_power_up_phy(adapter);
        e1000_reset(adapter);
        E1000_WRITE_REG(&adapter->hw, WUS, ~0);



Am Friday 03 November 2006 20:43 schrieb Auke Kok:
> 
> e1000: Fix regression: garbled stats and irq allocation during swsusp
> 
> After 7.0.33/2.6.16, e1000 suspend/resume left the user with an enabled
> device showing garbled statistics and undetermined irq allocation state,
> where `ifconfig eth0 down` would display `trying to free already freed irq`.
> 
> Explicitly free and allocate irq as well as powerup the PHY during resume
> fixes.
> 
> Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
> 
> diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
> index c0269b5..32cdccb 100644
> --- a/drivers/net/e1000/e1000_main.c
> +++ b/drivers/net/e1000/e1000_main.c
> @@ -5081,6 +5081,8 @@ #endif
>   	if (adapter->hw.phy_type == e1000_phy_igp_3)
>   		e1000_phy_powerdown_workaround(&adapter->hw);
> 
> +	e1000_free_irq(adapter);
> +
>   	/* Release control of h/w to f/w.  If f/w is AMT enabled, this
>   	 * would have already happened in close and is redundant. */
>   	e1000_release_hw_control(adapter);
> @@ -5111,6 +5113,10 @@ e1000_resume(struct pci_dev *pdev)
>   	pci_enable_wake(pdev, PCI_D3hot, 0);
>   	pci_enable_wake(pdev, PCI_D3cold, 0);
> 
> +	if ((err = e1000_request_irq(adapter)))
> +		return err;
> +
> +	e1000_power_up_phy(adapter);
>   	e1000_reset(adapter);
>   	E1000_WRITE_REG(&adapter->hw, WUS, ~0);
> 
> 

-- 
MfG/Sincerely

Toralf Förster
+++ I'm not subscribed to the email list, please Cc: me +++

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