acpi: Add a function to deregister all ioctl commands using the same function

This simplifies detach/cleanup for drivers that add multiple ACPI ioctls.

Reviewed by:	imp
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D54420

sys/dev/acpica/acpi.c

@@ -4334,6 +4334,21 @@ acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
     ACPI_UNLOCK(acpi);
 }
 
+void
+acpi_deregister_ioctls(acpi_ioctl_fn fn)
+{
+	struct acpi_ioctl_hook *hp, *thp;
+
+	ACPI_LOCK(acpi);
+	TAILQ_FOREACH_SAFE(hp, &acpi_ioctl_hooks, link, thp) {
+		if (hp->fn == fn) {
+			TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
+			free(hp, M_ACPIDEV);
+		}
+	}
+	ACPI_UNLOCK(acpi);
+}
+
 static int
 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
 {

sys/dev/acpica/acpi_battery.c

@@ -531,13 +531,7 @@ acpi_battery_init(void)
 
 out:
     if (error) {
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BATTINFO_V1, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BIF, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BIX, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BST, acpi_battery_ioctl);
-	acpi_deregister_ioctl(ACPIIO_BATT_GET_BST_V1, acpi_battery_ioctl);
+	acpi_deregister_ioctls(acpi_battery_ioctl);
     }
     return (error);
 }

sys/dev/acpica/acpiio.h

@@ -205,6 +205,7 @@ union acpi_battery_ioctl_arg {
 typedef int	(*acpi_ioctl_fn)(u_long cmd, caddr_t addr, void *arg);
 extern int	acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg);
 extern void	acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn);
+extern void	acpi_deregister_ioctls(acpi_ioctl_fn fn);
 #endif
 
 #endif /* !_ACPIIO_H_ */