[src/trunk]: src/sys/opencrypto If we get an error from devsw_attach(), don't...

[pgoyette <pgoyette%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b03677c34722
branches:  trunk
changeset: 744193:b03677c34722
user:      pgoyette <pgoyette%NetBSD.org@localhost>
date:      Mon Jan 27 02:56:15 2020 +0000

description:
If we get an error from devsw_attach(), don't destroy the error value,
since we need to return it to our caller.  While we're here, improve
the value of the debug message by actually printing the error value.

diffstat:

 sys/opencrypto/cryptodev.c |  15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

diffs (46 lines):

diff -r 8717c4c9278e -r b03677c34722 sys/opencrypto/cryptodev.c
--- a/sys/opencrypto/cryptodev.c        Mon Jan 27 01:15:09 2020 +0000
+++ b/sys/opencrypto/cryptodev.c        Mon Jan 27 02:56:15 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cryptodev.c,v 1.103 2020/01/16 15:29:24 christos Exp $ */
+/*     $NetBSD: cryptodev.c,v 1.104 2020/01/27 02:56:15 pgoyette Exp $ */
 /*     $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $        */
 /*     $OpenBSD: cryptodev.c,v 1.53 2002/07/10 22:21:30 mickey Exp $   */
 
@@ -64,7 +64,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.103 2020/01/16 15:29:24 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.104 2020/01/27 02:56:15 pgoyette Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -2201,6 +2201,7 @@
 {
        int error = 0;
 #ifdef _MODULE
+       int error2;
        devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR;
 #endif
 
@@ -2235,14 +2236,14 @@
                error = devsw_attach(crypto_cd.cd_name, NULL, &bmajor,
                    &crypto_cdevsw, &cmajor);
                if (error) {
-                       error = config_cfdata_detach(crypto_cfdata);
-                       if (error) {
-                               return error;
+                       error2 = config_cfdata_detach(crypto_cfdata);
+                       if (error2) {
+                               return error2;
                        }
                        config_cfattach_detach(crypto_cd.cd_name, &crypto_ca);
                        config_cfdriver_detach(&crypto_cd);
-                       aprint_error("%s: unable to register devsw\n",
-                               crypto_cd.cd_name);
+                       aprint_error("%s: unable to register devsw, error %d\n",
+                               crypto_cd.cd_name, error);
 
                        return error;
                }