From: Armin Wolf <W_Armin@xxxxxx>
commit dbd3e6eaf3d813939b28e8a66e29d81cdc836445 upstream.
The removal function is called regardless of whether
/proc/i8k was created successfully or not, the later
causing a WARN() on module removal.
Fix that by only registering the removal function
if /proc/i8k was created successfully.
Tested on a Inspiron 3505.
Fixes: 039ae58503f3 ("hwmon: Allow to compile dell-smm-hwmon driver without /proc/i8k")
Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
Acked-by: Pali Rohár <pali@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211112171440.59006-1-W_Armin@xxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwmon/dell-smm-hwmon.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -603,15 +603,18 @@ static const struct proc_ops i8k_proc_op
.proc_ioctl = i8k_ioctl,
};
+static struct proc_dir_entry *entry;
+
static void __init i8k_init_procfs(void)
{
/* Register the proc entry */
- proc_create("i8k", 0, NULL, &i8k_proc_ops);
+ entry = proc_create("i8k", 0, NULL, &i8k_proc_ops);
}
static void __exit i8k_exit_procfs(void)
{
- remove_proc_entry("i8k", NULL);
+ if (entry)
+ remove_proc_entry("i8k", NULL);
}
#else
