linux-kernel - [108/129] bcma: invalidate the mapped core over suspend/resume

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Date:	Mon, 23 Jan 2012 18:35:28 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Rafał Miłecki <zajec5@...il.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [108/129] bcma: invalidate the mapped core over suspend/resume

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------
Content-Length: 1013
Lines: 35

From: Rafał Miłecki <zajec5@...il.com>

commit 28e7d218da975f6ae1751e293aed938952c55c98 upstream.

This clears the currently mapped core when suspending, to force
re-mapping after resume. Without that we were touching default core
registers believing some other core is mapped. Such a behaviour
resulted in lockups on some machines.

Signed-off-by: Rafał Miłecki <zajec5@...il.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/bcma/host_pci.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -227,11 +227,14 @@ static void bcma_host_pci_remove(struct
 #ifdef CONFIG_PM
 static int bcma_host_pci_suspend(struct pci_dev *dev, pm_message_t state)
 {
+	struct bcma_bus *bus = pci_get_drvdata(dev);
+
 	/* Host specific */
 	pci_save_state(dev);
 	pci_disable_device(dev);
 	pci_set_power_state(dev, pci_choose_state(dev, state));
 
+	bus->mapped_core = NULL;
 	return 0;
 }
 


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