staging: gpib: gpio: Return error value from gpib_register_driver()

The function gpib_register_driver() can fail and does not return an
error value if it fails.

Return the error value if gpib_register_driver() fails. Add pr_err()
statement indicating the fail and also the error value.

Signed-off-by: Nihar Chaithanya <niharchaithanya@gmail.com>
Link: https://lore.kernel.org/r/20241230185633.175690-9-niharchaithanya@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/gpib/gpio/gpib_bitbang.c b/drivers/staging/gpib/gpio/gpib_bitbang.c
index a2d562cbd65b43bd902c6ba6f1c117323423abf2..057f9264de346e2ff10c7bdf681c09cf6278e381 100644 (file)
--- a/drivers/staging/gpib/gpio/gpib_bitbang.c
+++ b/drivers/staging/gpib/gpio/gpib_bitbang.c
@@ -1341,7 +1341,12 @@ return_to_local : bb_return_to_local,
 
 static int __init bb_init_module(void)
 {
-       gpib_register_driver(&bb_interface, THIS_MODULE);
+       int result = gpib_register_driver(&bb_interface, THIS_MODULE);
+
+       if (result) {
+               pr_err("gpib_bitbang: gpib_register_driver failed: error = %d\n", result);
+               return result;
+       }
 
        dbg_printk(0, "module loaded with pin map \"%s\"%s\n",
                   pin_map, (sn7516x_used) ? " and SN7516x driver support" : "");