commit a04ce0ffcaf561994ecf382cd3caad75556dc499
author Brett M Russ <russb@emc.com> Mon Aug 15 15:23:41 2005 -0400
committer Greg Kroah-Hartman <gregkh@suse.de> Thu Sep 08 15:07:08 2005 -0700
tree e891a767810333fe2bf29ddb35f57b0a3ec6e18e
parent 3fe9d19f9e86a55679f5f2b38ec0a43a1a510cee

[PATCH] PCI/libata INTx cleanup

Simple cleanup to eliminate X copies of the pci_enable_intx() function
in libata.  Moved ahci.c's pci_intx() to pci.c and use it throughout
libata and msi.c.

Signed-off-by: Brett Russ <russb@emc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/msi.c

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 532f73b..ee8677b 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -439,10 +439,7 @@
 	}
     	if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
 		/* PCI Express Endpoint device detected */
-		u16 cmd;
-		pci_read_config_word(dev, PCI_COMMAND, &cmd);
-		cmd |= PCI_COMMAND_INTX_DISABLE;
-		pci_write_config_word(dev, PCI_COMMAND, cmd);
+		pci_intx(dev, 0);  /* disable intx */
 	}
 }
 
@@ -461,10 +458,7 @@
 	}
     	if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
 		/* PCI Express Endpoint device detected */
-		u16 cmd;
-		pci_read_config_word(dev, PCI_COMMAND, &cmd);
-		cmd &= ~PCI_COMMAND_INTX_DISABLE;
-		pci_write_config_word(dev, PCI_COMMAND, cmd);
+		pci_intx(dev, 1);  /* enable intx */
 	}
 }
 

drivers/pci/pci.c

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e179af3..ccff633 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -798,6 +798,31 @@
 	}
 }
 
+/**
+ * pci_intx - enables/disables PCI INTx for device dev
+ * @dev: the PCI device to operate on
+ * @enable: boolean
+ *
+ * Enables/disables PCI INTx for device dev
+ */
+void
+pci_intx(struct pci_dev *pdev, int enable)
+{
+	u16 pci_command, new;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
+
+	if (enable) {
+		new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
+	} else {
+		new = pci_command | PCI_COMMAND_INTX_DISABLE;
+	}
+
+	if (new != pci_command) {
+		pci_write_config_word(pdev, PCI_COMMAND, pci_command);
+	}
+}
+
 #ifndef HAVE_ARCH_PCI_SET_DMA_MASK
 /*
  * These can be overridden by arch-specific implementations
@@ -875,6 +900,7 @@
 EXPORT_SYMBOL(pci_set_master);
 EXPORT_SYMBOL(pci_set_mwi);
 EXPORT_SYMBOL(pci_clear_mwi);
+EXPORT_SYMBOL_GPL(pci_intx);
 EXPORT_SYMBOL(pci_set_dma_mask);
 EXPORT_SYMBOL(pci_set_consistent_dma_mask);
 EXPORT_SYMBOL(pci_assign_resource);