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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2016-05-03 05:22:27 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2016-05-10 11:58:29 +0300
commit524edf3877775c46e8b3ba56f9dd75d07914392c (patch)
tree8c4e34211850a802e8243842ab15971d455ce564
parent18b6562c243f3a4be91a7a240090ebefccf39761 (diff)
fbdev: fbmem: implement error handling in fbmem_init()
fbmem_init() ignores all errors, while fbmem_exit() does not check if deallocating resources are valid. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
-rw-r--r--drivers/video/fbdev/core/fbmem.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 4e73b6f..76c1ad9 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1854,17 +1854,31 @@ EXPORT_SYMBOL(fb_set_suspend);
static int __init
fbmem_init(void)
{
- proc_create("fb", 0, NULL, &fb_proc_fops);
+ int ret;
+
+ if (!proc_create("fb", 0, NULL, &fb_proc_fops))
+ return -ENOMEM;
- if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
+ ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
+ if (ret) {
printk("unable to get major %d for fb devs\n", FB_MAJOR);
+ goto err_chrdev;
+ }
fb_class = class_create(THIS_MODULE, "graphics");
if (IS_ERR(fb_class)) {
- printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
+ ret = PTR_ERR(fb_class);
+ pr_warn("Unable to create fb class; errno = %d\n", ret);
fb_class = NULL;
+ goto err_class;
}
return 0;
+
+err_class:
+ unregister_chrdev(FB_MAJOR, "fb");
+err_chrdev:
+ remove_proc_entry("fb", NULL);
+ return ret;
}
#ifdef MODULE