[PATCH] genirq: fix error path in __setup_irq

[PATCH] genirq: fix error path in __setup_irq

[Heiner Kallweit]

If __irq_set_trigger() fails irq_request_resources() was successfully
called before. Therefore we should release all potentially claimed
resources in the error path.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 kernel/irq/manage.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 49c37f1e..4c34696c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1318,8 +1318,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 			ret = __irq_set_trigger(desc,
 						new->flags & IRQF_TRIGGER_MASK);
 
-			if (ret)
+			if (ret) {
+				irq_release_resources(desc);
 				goto out_mask;
+			}
 		}
 
 		desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \
-- 
2.13.1

[tip:irq/urgent] genirq: Release resources in __setup_irq() error path

[tip-bot for Heiner Kallweit]

Commit-ID:  fa07ab72cbb0d843429e61bf179308aed6cbe0dd
Gitweb:     http://git.kernel.org/tip/fa07ab72cbb0d843429e61bf179308aed6cbe0dd
Author:     Heiner Kallweit <hkallweit1@gmail.com>
AuthorDate: Sun, 11 Jun 2017 00:38:36 +0200
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 13 Jun 2017 00:40:39 +0200

genirq: Release resources in __setup_irq() error path

In case __irq_set_trigger() fails the resources requested via
irq_request_resources() are not released.

Add the missing release call into the error handling path.

Fixes: c1bacbae8192 ("genirq: Provide irq_request/release_resources chip callbacks")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/655538f5-cb20-a892-ff15-fbd2dd1fa4ec@gmail.com

---
 kernel/irq/manage.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 070be98..425170d 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1312,8 +1312,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 			ret = __irq_set_trigger(desc,
 						new->flags & IRQF_TRIGGER_MASK);
 
-			if (ret)
+			if (ret) {
+				irq_release_resources(desc);
 				goto out_mask;
+			}
 		}
 
 		desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \