File follow-latest-PCI-class.patch of Package irqbalance.3491

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File follow-latest-PCI-class.patch of Package irqbalance.3491

From: Yong Yang <yangoliver@gmail.com>
Subject: Follow latest PCI class code spec
References: bsc#949276
Patch-Mainline: v1.0.9
Git-commit: 856435ee3250c47fb7b0d4b5f102fda477418771
Git-repo: github.com/Irqbalance/irqbalance.git

Signed-off-by: Thomas Renninger <trenn@suse.de>

Original code used an old PCI-SIG spec for PCI class code definition:
"PCI Local Bus Specification Revision 3.0". In fact, the PCI class
code definition in this spec has been obsoleted for a long time.

Today, PCI-SIG uses a separate spec for PCI class code definition:
"PCI Code and ID Assignment Specification v1.5".

Without the fix, it is possible that new PCI devices are classified
incorrectly by irqbalance code. Two major codes and one sub-class code
were added in the change.

Signed-off-by: Yong Yang <yangoliver@gmail.com>

Index: irqbalance-1.0.7/classify.c
===================================================================
--- irqbalance-1.0.7.orig/classify.c	2016-04-06 12:22:41.985934120 +0200
+++ irqbalance-1.0.7/classify.c	2016-04-06 12:22:44.782092763 +0200
@@ -38,8 +38,8 @@ static GList *cl_banned_irqs = NULL;
 
 #define SYSDEV_DIR "/sys/bus/pci/devices"
 
-#define PCI_MAX_CLASS 0x12
-#define PCI_MAX_SERIAL_SUBCLASS 0x10
+#define PCI_MAX_CLASS 0x14
+#define PCI_MAX_SERIAL_SUBCLASS 0x81
 
 static int get_pci_irq_class(int pci_class)
 {
@@ -47,7 +47,10 @@ static int get_pci_irq_class(int pci_cla
 	int sub = (pci_class & 0xFF00) >> 8;
 	short irq_class = IRQ_NODEF;
 	/*
-	 * Class codes lifted from pci spec, appendix D.
+	 * Class codes lifted from below PCI-SIG spec:
+	 *
+	 * PCI Code and ID Assignment Specification v1.5
+	 *
 	 * and mapped to irqbalance types here.
 	 *
 	 * IRQ_NODEF will go through classification by PCI sub-class code.
@@ -71,6 +74,8 @@ static int get_pci_irq_class(int pci_cla
 		IRQ_OTHER,
 		IRQ_OTHER,
 		IRQ_OTHER,
+		IRQ_LEGACY,
+		IRQ_LEGACY,
 	};
 
 	/*
@@ -88,6 +93,8 @@ static int get_pci_irq_class(int pci_cla
 		IRQ_LEGACY,
 		IRQ_LEGACY,
 		IRQ_LEGACY,
+		[0xa ... 0x7f] = IRQ_NODEF,
+		IRQ_LEGACY,
 	};
 
 	/*

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File follow-latest-PCI-class.patch of Package irqbalance.3491

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