From e20ffb84ab9aabc5b5450065580a370d27f2b449 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 29 Mar 2019 01:45:30 +0000
Subject: [PATCH] qla2x00t-32gbit: Backport to RHEL 6

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8108 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 qla2x00t-32gbit/qla_isr.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/qla2x00t-32gbit/qla_isr.c b/qla2x00t-32gbit/qla_isr.c
index d95edcce1..4d0cb6c25 100644
--- a/qla2x00t-32gbit/qla_isr.c
+++ b/qla2x00t-32gbit/qla_isr.c
@@ -3421,6 +3421,25 @@ qla2xxx_msix_rsp_q(int irq, void *dev_id)
 
 /* Interrupt handling helpers. */
 
+/* <linux/pci.h> */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0) &&	\
+	(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 7)
+/*
+ * See also commit aff171641d18 ("PCI: Provide sensible IRQ vector alloc/free
+ * routines") # v4.8.
+ */
+/**
+ * pci_irq_vector - return Linux IRQ number of a device vector
+ * @dev: PCI device to operate on
+ * @nr: device-relative interrupt vector index (0-based).
+ */
+static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
+{
+	return dev->irq + nr;
+}
+#endif
+
 struct qla_init_msix_entry {
 	const char *name;
 	irq_handler_t handler;