---

yaml --- r: 293977 b: refs/heads/master c: a96d627 h: refs/heads/master i: 293975: a121ff0 v: v3
git-mirror · Jan 12, 2012 · a2f9d03 · a2f9d03
1 parent be31696
commit a2f9d03
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Showing 3 changed files with 27 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8605c6844fb9bdf55471bb87c3ac62d44eb34e04
+refs/heads/master: a96d627abaac899e8bfaf18fd0578b228c9c752f
diff --git a/trunk/drivers/pci/pci.c b/trunk/drivers/pci/pci.c
@@ -3162,6 +3162,31 @@ int __pci_reset_function(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(__pci_reset_function);
 
+/**
+ * __pci_reset_function_locked - reset a PCI device function while holding
+ * the @dev mutex lock.
+ * @dev: PCI device to reset
+ *
+ * Some devices allow an individual function to be reset without affecting
+ * other functions in the same device.  The PCI device must be responsive
+ * to PCI config space in order to use this function.
+ *
+ * The device function is presumed to be unused and the caller is holding
+ * the device mutex lock when this function is called.
+ * Resetting the device will make the contents of PCI configuration space
+ * random, so any caller of this must be prepared to reinitialise the
+ * device including MSI, bus mastering, BARs, decoding IO and memory spaces,
+ * etc.
+ *
+ * Returns 0 if the device function was successfully reset or negative if the
+ * device doesn't support resetting a single function.
+ */
+int __pci_reset_function_locked(struct pci_dev *dev)
+{
+	return pci_dev_reset(dev, 1);
+}
+EXPORT_SYMBOL_GPL(__pci_reset_function_locked);
+
 /**
  * pci_probe_reset_function - check whether the device can be safely reset
  * @dev: PCI device to reset

diff --git a/trunk/include/linux/pci.h b/trunk/include/linux/pci.h
@@ -817,6 +817,7 @@ int pcie_set_readrq(struct pci_dev *dev, int rq);
 int pcie_get_mps(struct pci_dev *dev);
 int pcie_set_mps(struct pci_dev *dev, int mps);
 int __pci_reset_function(struct pci_dev *dev);
+int __pci_reset_function_locked(struct pci_dev *dev);
 int pci_reset_function(struct pci_dev *dev);
 void pci_update_resource(struct pci_dev *dev, int resno);
 int __must_check pci_assign_resource(struct pci_dev *dev, int i);