linux-kernel - [PATCH] ricoh_mmc: Use suspend/resume

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Message-ID: <40499.98.210.152.237.1231345314.squirrel@overt.org>
Date:	Wed, 7 Jan 2009 11:21:54 -0500 (EST)
From:	philipl@...rt.org
To:	"linux kernel" <linux-kernel@...r.kernel.org>,
	sdhci-devel@...t.drzeus.cx, sfr@...b.auug.org.au, rjw@...k.pl
Cc:	"Pierre Ossman" <drzeus@...eus.cx>
Subject: [PATCH] ricoh_mmc: Use suspend/resume_noirq (v2) (resend)

If ricoh_mmc suspends before sdhci_pci, it will pull the card
out from under the controller, which could leave the system in
a very confused state.

Using suspend/resume_noirq ensures that sdhci_pci suspends first
and resumes second.

Signed-off-by: Philip Langdale <philipl@...rt.org>
Acked-by: Pierre Ossman <drzeus@...eus.cx>
---

  ricoh_mmc.c |   20 ++++++++++++++++----
  1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/ricoh_mmc.c b/drivers/mmc/host/ricoh_mmc.c
index 1837719..b4958a7 100644
--- a/drivers/mmc/host/ricoh_mmc.c
+++ b/drivers/mmc/host/ricoh_mmc.c
@@ -194,10 +194,14 @@ static void __devexit ricoh_mmc_remove(struct pci_dev *pdev)
 	pci_set_drvdata(pdev, NULL);
 }

-static int ricoh_mmc_suspend(struct pci_dev *pdev, pm_message_t state) +static int
ricoh_mmc_suspend_noirq(struct device *dev)
 {
+	struct pci_dev *pdev = NULL;
 	struct pci_dev *fw_dev = NULL;

+	pdev = to_pci_dev(dev);
+	BUG_ON(pdev == NULL);
+
 	fw_dev = pci_get_drvdata(pdev);
 	BUG_ON(fw_dev == NULL);

@@ -208,10 +212,14 @@ static int ricoh_mmc_suspend(struct pci_dev *pdev, pm_message_t state)
 	return 0;
 }

-static int ricoh_mmc_resume(struct pci_dev *pdev)
+static int ricoh_mmc_resume_noirq(struct device *dev)
 {
+	struct pci_dev *pdev = NULL;
 	struct pci_dev *fw_dev = NULL;

+	pdev = to_pci_dev(dev);
+	BUG_ON(pdev == NULL);
+
 	fw_dev = pci_get_drvdata(pdev);
 	BUG_ON(fw_dev == NULL);

@@ -222,13 +230,17 @@ static int ricoh_mmc_resume(struct pci_dev *pdev)
 	return 0;
 }

+static struct dev_pm_ops ricoh_mmc_pm_opts = {
+	.suspend_noirq =	ricoh_mmc_suspend_noirq,
+	.resume_noirq =		ricoh_mmc_resume_noirq,
+};
+
 static struct pci_driver ricoh_mmc_driver = {
 	.name = 	DRIVER_NAME,
 	.id_table =	pci_ids,
 	.probe = 	ricoh_mmc_probe,
 	.remove =	__devexit_p(ricoh_mmc_remove),
-	.suspend =	ricoh_mmc_suspend,
-	.resume =	ricoh_mmc_resume,
+	.driver.pm =	&ricoh_mmc_pm_opts,
 };

 /*****************************************************************************\

Rafael,

Pierre asked that you take this patch into your tree because it depends on
the new pm ops design.

Thanks,

--phil

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