via-pmu: Add compat_pmu_ioctl

The ioctls are actually compatible, but due to historical mistake the
numbers differ between 32bit and 64bit.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 35bc2737412..2d17e76066b 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -45,6 +45,7 @@
 #include <linux/syscalls.h>
 #include <linux/suspend.h>
 #include <linux/cpu.h>
+#include <linux/compat.h>
 #include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/io.h>
@@ -2349,11 +2350,52 @@ static long pmu_unlocked_ioctl(struct file *filp,
         return ret;
 }
 
+#ifdef CONFIG_COMPAT
+#define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
+#define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
+#define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
+#define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
+#define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
+#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
+
+static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
+{
+        switch (cmd) {
+        case PMU_IOC_SLEEP:
+                break;
+        case PMU_IOC_GET_BACKLIGHT32:
+                cmd = PMU_IOC_GET_BACKLIGHT;
+                break;
+        case PMU_IOC_SET_BACKLIGHT32:
+                cmd = PMU_IOC_SET_BACKLIGHT;
+                break;
+        case PMU_IOC_GET_MODEL32:
+                cmd = PMU_IOC_GET_MODEL;
+                break;
+        case PMU_IOC_HAS_ADB32:
+                cmd = PMU_IOC_HAS_ADB;
+                break;
+        case PMU_IOC_CAN_SLEEP32:
+                cmd = PMU_IOC_CAN_SLEEP;
+                break;
+        case PMU_IOC_GRAB_BACKLIGHT32:
+                cmd = PMU_IOC_GRAB_BACKLIGHT;
+                break;
+        default:
+                return -ENOIOCTLCMD;
+        }
+        return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static const struct file_operations pmu_device_fops = {
         .read           = pmu_read,
         .write          = pmu_write,
         .poll           = pmu_fpoll,
         .unlocked_ioctl = pmu_unlocked_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = compat_pmu_ioctl,
+#endif
         .open           = pmu_open,
         .release        = pmu_release,
 };