hwmon: Let w83781d and lm78 load again

Let the w83781d and lm78 hardware monitoring drivers load even when
no chip was detected at the ISA address. There can still be supported
chips connected to an I2C bus or SMBus.

This fixes bug #7293.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index a4584ec69842..fea92061f863 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1685,11 +1685,10 @@ sensors_w83781d_init(void)
         if (res)
                 return res;
 
-        res = i2c_isa_add_driver(&w83781d_isa_driver);
-        if (res) {
-                i2c_del_driver(&w83781d_driver);
-                return res;
-        }
+        /* Don't exit if this one fails, we still want the I2C variants
+           to work! */
+        if (i2c_isa_add_driver(&w83781d_isa_driver))
+                isa_address = 0;
 
         return 0;
 }
@@ -1697,7 +1696,8 @@ sensors_w83781d_init(void)
 static void __exit
 sensors_w83781d_exit(void)
 {
-        i2c_isa_del_driver(&w83781d_isa_driver);
+        if (isa_address)
+                i2c_isa_del_driver(&w83781d_isa_driver);
         i2c_del_driver(&w83781d_driver);
 }