The SONET_* ioctls are SONET/SDH PHY controls that atm_dev_ioctl() and
the compat path only ever forwarded to the driver's ->ioctl() handler.
The PHY drivers that implemented them (the S/UNI library and the framers
on the removed PCI/SBUS adapters) are gone, and neither surviving driver
services them: solos-pci has no ->ioctl, and usbatm handles only
ATM_QUERYLOOP. They now uniformly return an error regardless.

Drop the SONET compat passthrough and the SONET cases in atm_dev_ioctl(),
along with the now-unused linux/sonet.h includes. The SONET_* uAPI
definitions are untouched.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/atm/ioctl.c     | 13 -------------
 net/atm/resources.c |  5 -----
 2 files changed, 18 deletions(-)

diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c
index 0f3f9ad8301f..4f2d185bf2f0 100644
--- a/net/atm/ioctl.c
+++ b/net/atm/ioctl.c
@@ -13,7 +13,6 @@
 #include <linux/atmdev.h>
 #include <linux/atmarp.h>	/* manifest constants */
 #include <linux/capability.h>
-#include <linux/sonet.h>	/* for ioctls */
 #include <linux/atmsvc.h>
 #include <linux/mutex.h>
 #include <asm/ioctls.h>
@@ -290,18 +289,6 @@ static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
 	int i;
 	unsigned int cmd = 0;
 
-	switch (cmd32) {
-	case SONET_GETSTAT:
-	case SONET_GETSTATZ:
-	case SONET_GETDIAG:
-	case SONET_SETDIAG:
-	case SONET_CLRDIAG:
-	case SONET_SETFRAMING:
-	case SONET_GETFRAMING:
-	case SONET_GETFRSENSE:
-		return do_atmif_sioc(sock, cmd32, arg);
-	}
-
 	for (i = 0; i < NR_ATM_IOCTL; i++) {
 		if (cmd32 == atm_ioctl_map[i].cmd32) {
 			cmd = atm_ioctl_map[i].cmd;
diff --git a/net/atm/resources.c b/net/atm/resources.c
index 939452a610c0..7aac25e917b4 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -13,7 +13,6 @@
 #include <linux/ctype.h>
 #include <linux/string.h>
 #include <linux/atmdev.h>
-#include <linux/sonet.h>
 #include <linux/kernel.h> /* for barrier */
 #include <linux/module.h>
 #include <linux/bitops.h>
@@ -361,10 +360,6 @@ int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
 		}
 		fallthrough;
 	case ATM_SETCIRANGE:
-	case SONET_GETSTATZ:
-	case SONET_SETDIAG:
-	case SONET_CLRDIAG:
-	case SONET_SETFRAMING:
 		if (!capable(CAP_NET_ADMIN)) {
 			error = -EPERM;
 			goto done;
-- 
2.54.0