[GIT pull] irq/urgent for 5.3-rc5

[Thomas Gleixner]

Linus,

please pull the latest irq-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
irq-urgent-for-linus

up to:  d0ff14fdc987: genirq: Properly pair kobject_del() with kobject_add()

A single fix for a imbalanced kobject operation in the irq decriptor code
which was unearthed by the new warnings in the kobject code.

Thanks,

        tglx

------------------>
Michael Kelley (1):
      genirq: Properly pair kobject_del() with kobject_add()


 kernel/irq/irqdesc.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 9484e88dabc2..9be995fc3c5a 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -295,6 +295,18 @@ static void irq_sysfs_add(int irq, struct irq_desc *desc)
        }
 }
 
+static void irq_sysfs_del(struct irq_desc *desc)
+{
+       /*
+        * If irq_sysfs_init() has not yet been invoked (early boot), then
+        * irq_kobj_base is NULL and the descriptor was never added.
+        * kobject_del() complains about a object with no parent, so make
+        * it conditional.
+        */
+       if (irq_kobj_base)
+               kobject_del(&desc->kobj);
+}
+
 static int __init irq_sysfs_init(void)
 {
        struct irq_desc *desc;
@@ -325,6 +337,7 @@ static struct kobj_type irq_kobj_type = {
 };
 
 static void irq_sysfs_add(int irq, struct irq_desc *desc) {}
+static void irq_sysfs_del(struct irq_desc *desc) {}
 
 #endif /* CONFIG_SYSFS */
 
@@ -438,7 +451,7 @@ static void free_desc(unsigned int irq)
         * The sysfs entry must be serialized against a concurrent
         * irq_sysfs_init() as well.
         */
-       kobject_del(&desc->kobj);
+       irq_sysfs_del(desc);
        delete_irq_desc(irq);
 
        /*