From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/virt/lib/irqbypass.c | 43 +++++++++++++++++++++----------------------
1 files changed, 21 insertions(+), 22 deletions(-)
diff --git a/kernel/virt/lib/irqbypass.c b/kernel/virt/lib/irqbypass.c
index 6d2fcd6..28fda42 100644
--- a/kernel/virt/lib/irqbypass.c
+++ b/kernel/virt/lib/irqbypass.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* IRQ offload/bypass manager
*
* Copyright (C) 2015 Red Hat, Inc.
* Copyright (c) 2015 Linaro Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*
* Various virtualization hardware acceleration techniques allow bypassing or
* offloading interrupts received from devices around the host kernel. Posted
@@ -88,6 +85,7 @@
{
struct irq_bypass_producer *tmp;
struct irq_bypass_consumer *consumer;
+ int ret;
if (!producer->token)
return -EINVAL;
@@ -101,20 +99,16 @@
list_for_each_entry(tmp, &producers, node) {
if (tmp->token == producer->token) {
- mutex_unlock(&lock);
- module_put(THIS_MODULE);
- return -EBUSY;
+ ret = -EBUSY;
+ goto out_err;
}
}
list_for_each_entry(consumer, &consumers, node) {
if (consumer->token == producer->token) {
- int ret = __connect(producer, consumer);
- if (ret) {
- mutex_unlock(&lock);
- module_put(THIS_MODULE);
- return ret;
- }
+ ret = __connect(producer, consumer);
+ if (ret)
+ goto out_err;
break;
}
}
@@ -124,6 +118,10 @@
mutex_unlock(&lock);
return 0;
+out_err:
+ mutex_unlock(&lock);
+ module_put(THIS_MODULE);
+ return ret;
}
EXPORT_SYMBOL_GPL(irq_bypass_register_producer);
@@ -182,6 +180,7 @@
{
struct irq_bypass_consumer *tmp;
struct irq_bypass_producer *producer;
+ int ret;
if (!consumer->token ||
!consumer->add_producer || !consumer->del_producer)
@@ -196,20 +195,16 @@
list_for_each_entry(tmp, &consumers, node) {
if (tmp->token == consumer->token || tmp == consumer) {
- mutex_unlock(&lock);
- module_put(THIS_MODULE);
- return -EBUSY;
+ ret = -EBUSY;
+ goto out_err;
}
}
list_for_each_entry(producer, &producers, node) {
if (producer->token == consumer->token) {
- int ret = __connect(producer, consumer);
- if (ret) {
- mutex_unlock(&lock);
- module_put(THIS_MODULE);
- return ret;
- }
+ ret = __connect(producer, consumer);
+ if (ret)
+ goto out_err;
break;
}
}
@@ -219,6 +214,10 @@
mutex_unlock(&lock);
return 0;
+out_err:
+ mutex_unlock(&lock);
+ module_put(THIS_MODULE);
+ return ret;
}
EXPORT_SYMBOL_GPL(irq_bypass_register_consumer);
--
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