[PATCH 1/1] isdn: Make CONFIG_ISDN depend on CONFIG_NETDEVICES

It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. Therefore insisting that ISDN
depends on NETDEVICES seems logical. We can then remove any
guards mentioning NETDEVICES inside all subordinate drivers.

This also has the nice side-effect of fixing the warning below
when ISDN_I4L && !CONFIG_NETDEVICES at compile time.

This patch fixes:
drivers/isdn/i4l/isdn_common.c: In function ‘isdn_ioctl’:
drivers/isdn/i4l/isdn_common.c:1278:8: warning: unused variable ‘s’ [-Wunused-variable]

Cc: Karsten Keil <redacted>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <redacted>
---
 drivers/isdn/Kconfig           |    2 +-
 drivers/isdn/i4l/Kconfig       |    2 +-
 drivers/isdn/i4l/isdn_common.c |    4 ----
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/isdn/Kconfig b/drivers/isdn/Kconfig
index a233ed5..86cd75a 100644
--- a/drivers/isdn/Kconfig
+++ b/drivers/isdn/Kconfig

@@ -4,7 +4,7 @@
 
 menuconfig ISDN
 	bool "ISDN support"
-	depends on NET
+	depends on NET && NETDEVICES
 	depends on !S390 && !UML
 	---help---
 	  ISDN ("Integrated Services Digital Network", called RNIS in France)

diff --git a/drivers/isdn/i4l/Kconfig b/drivers/isdn/i4l/Kconfig
index 2302fbe..9c6650e 100644
--- a/drivers/isdn/i4l/Kconfig
+++ b/drivers/isdn/i4l/Kconfig

@@ -6,7 +6,7 @@ if ISDN_I4L
 
 config ISDN_PPP
 	bool "Support synchronous PPP"
-	depends on INET && NETDEVICES
+	depends on INET
 	select SLHC
 	help
 	  Over digital connections such as ISDN, there is no need to

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index 8c610fa..e2a945e 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c

@@ -1312,7 +1312,6 @@ isdn_ioctl(struct file *file, uint cmd, ulong arg)
 			} else
 				return -EINVAL;
 			break;
-#ifdef CONFIG_NETDEVICES
 		case IIOCNETGPN:
 			/* Get peer phone number of a connected
 			 * isdn network interface */

@@ -1322,7 +1321,6 @@ isdn_ioctl(struct file *file, uint cmd, ulong arg)
 				return isdn_net_getpeer(&phone, argp);
 			} else
 				return -EINVAL;
-#endif
 		default:
 			return -EINVAL;
 		}

@@ -1352,7 +1350,6 @@ isdn_ioctl(struct file *file, uint cmd, ulong arg)
 		case IIOCNETLCR:
 			printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
 			return -ENODEV;
-#ifdef CONFIG_NETDEVICES
 		case IIOCNETAIF:
 			/* Add a network-interface */
 			if (arg) {

@@ -1491,7 +1488,6 @@ isdn_ioctl(struct file *file, uint cmd, ulong arg)
 				return -EFAULT;
 			return isdn_net_force_hangup(name);
 			break;
-#endif                          /* CONFIG_NETDEVICES */
 		case IIOCSETVER:
 			dev->net_verbose = arg;
 			printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);

-- 
1.7.9.5

On Wed,  7 Nov 2012 10:55:03 +0100
Lee Jones [off-list ref] wrote:

It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. 

I would disagree. However what I don't understand and you've not
explained is why the current code is a bug or a problem ?

This seems to be a make-work inconvenience causing patch that serves no
useful purpose ?

Alan

From: Alan Cox <redacted>
Date: Wed, 7 Nov 2012 15:04:36 +0000

On Wed,  7 Nov 2012 10:55:03 +0100
Lee Jones [off-list ref] wrote:

quoted

It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. 

I would disagree. However what I don't understand and you've not
explained is why the current code is a bug or a problem ?

This seems to be a make-work inconvenience causing patch that serves no
useful purpose ?

The ISDN drivers are peppered with CONFIG_NETDEVICES protection,
but there are missing cases in several locations.

This is ugly, and causes build problems, so adding the dependency
is the cleanest and most correct soluation and I fully intend
to apply this patch.

From: Lee Jones <redacted>
Date: Wed,  7 Nov 2012 10:55:03 +0100

It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. Therefore insisting that ISDN
depends on NETDEVICES seems logical. We can then remove any
guards mentioning NETDEVICES inside all subordinate drivers.

This also has the nice side-effect of fixing the warning below
when ISDN_I4L && !CONFIG_NETDEVICES at compile time.

This patch fixes:
drivers/isdn/i4l/isdn_common.c: In function ‘isdn_ioctl’:
drivers/isdn/i4l/isdn_common.c:1278:8: warning: unused variable ‘s’ [-Wunused-variable]

Cc: Karsten Keil <redacted>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <redacted>

Applied, thanks.

Am 07.11.2012 10:55, schrieb Lee Jones:

It doesn't make much sense to enable ISDN services if you don't
intend to connect to a network. Therefore insisting that ISDN
depends on NETDEVICES seems logical.

Well, not quite. ISDN is (was?) also used for telephony applications
which could work just fine without network devices. But I guess not
many kernels will actually be built with CONFIG_NETDEVICES=n, so the
inconvenience is small.

-- 
Tilman Schmidt                    E-Mail: tilman@imap.cc
Bonn, Germany
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