From: Andrew Morton <akpm@osdl.org>
Date: Tue, 28 Mar 2006 09:56:18 +0000 (-0800)
Subject: [PATCH] paride: register_chrdev fix
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8637980bab3f09157eef20cc65d2eb7393c770fd;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] paride: register_chrdev fix

If the user specified `major=0' (odd thing to do), pg.c will use dynamic
allocation.  We need to pick up that major for subsequent unregister_chrdev().

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c
index 6f5df0fad703..79b868254032 100644
--- a/drivers/block/paride/pg.c
+++ b/drivers/block/paride/pg.c
@@ -643,7 +643,8 @@ static ssize_t pg_read(struct file *filp, char __user *buf, size_t count, loff_t
 
 static int __init pg_init(void)
 {
-	int unit, err = 0;
+	int unit;
+	int err;
 
 	if (disable){
 		err = -1;
@@ -657,16 +658,17 @@ static int __init pg_init(void)
 		goto out;
 	}
 
-	if (register_chrdev(major, name, &pg_fops)) {
+	err = register_chrdev(major, name, &pg_fops);
+	if (err < 0) {
 		printk("pg_init: unable to get major number %d\n", major);
 		for (unit = 0; unit < PG_UNITS; unit++) {
 			struct pg *dev = &devices[unit];
 			if (dev->present)
 				pi_release(dev->pi);
 		}
-		err = -1;
 		goto out;
 	}
+	major = err;	/* In case the user specified `major=0' (dynamic) */
 	pg_class = class_create(THIS_MODULE, "pg");
 	if (IS_ERR(pg_class)) {
 		err = PTR_ERR(pg_class);