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

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Message-ID: <454B9BED.306@intel.com>
Date:	Fri, 03 Nov 2006 11:43:41 -0800
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	torvalds@...l.org, linux-kernel@...r.kernel.org, greg@...ah.com,
	stable@...r.kernel.org
CC:	rjw@...k.pl, bunk@...sta.de, akpm@...l.org,
	laurent.riffard@...e.fr, rajesh.shah@...el.com,
	toralf.foerster@....de, jeff@...zik.org, pavel@....cz,
	auke-jan.h.kok@...el.com, 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: [PATCH] e1000: Fix regression: garbled stats and irq allocation during
 swsusp


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);
-
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