mmc: sdhci-pci: add flag for devices that can support runtime PM

Only allow runtime PM for devices that specifically indicate
that they support it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index f49b184308c0..d833d9c2f7e3 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -47,6 +47,7 @@ struct sdhci_pci_slot;
 
 struct sdhci_pci_fixes {
         unsigned int            quirks;
+        bool                    allow_runtime_pm;
 
         int                     (*probe) (struct sdhci_pci_chip *);
 
@@ -72,6 +73,7 @@ struct sdhci_pci_chip {
         struct pci_dev          *pdev;
 
         unsigned int            quirks;
+        bool                    allow_runtime_pm;
         const struct sdhci_pci_fixes *fixes;
 
         int                     num_slots;      /* Slots on controller */
@@ -305,16 +307,19 @@ static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
 
 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+        .allow_runtime_pm = true,
         .probe_slot     = mfd_sd_probe_slot,
         .remove_slot    = mfd_sd_remove_slot,
 };
 
 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+        .allow_runtime_pm = true,
 };
 
 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+        .allow_runtime_pm = true,
         .probe_slot     = mfd_emmc_probe_slot,
         .remove_slot    = mfd_emmc_remove_slot,
 };
@@ -1355,8 +1360,10 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 
         chip->pdev = pdev;
         chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
-        if (chip->fixes)
+        if (chip->fixes) {
                 chip->quirks = chip->fixes->quirks;
+                chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
+        }
         chip->num_slots = slots;
 
         pci_set_drvdata(pdev, chip);
@@ -1381,7 +1388,8 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
                 chip->slots[i] = slot;
         }
 
-        sdhci_pci_runtime_pm_allow(&pdev->dev);
+        if (chip->allow_runtime_pm)
+                sdhci_pci_runtime_pm_allow(&pdev->dev);
 
         return 0;
 
@@ -1399,11 +1407,12 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
         int i;
         struct sdhci_pci_chip *chip;
 
-        sdhci_pci_runtime_pm_forbid(&pdev->dev);
-
         chip = pci_get_drvdata(pdev);
 
         if (chip) {
+                if (chip->allow_runtime_pm)
+                        sdhci_pci_runtime_pm_forbid(&pdev->dev);
+
                 for (i = 0; i < chip->num_slots; i++)
                         sdhci_pci_remove_slot(chip->slots[i]);