USB: usbfs: Add a capability flag for runtime suspend

The recent commit 7794f486ed0b ("usbfs: Add ioctls for runtime power
management") neglected to add a corresponding capability flag.  This
patch rectifies the omission.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Mayuresh Kulkarni <mkulkarni@opensource.cirrus.com>
Link: https://lore.kernel.org/r/Pine.LNX.4.44L0.1908131613490.1941-100000@iolanthe.rowland.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 5db7b6d..24d4a80 100644 (file)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -44,6 +44,12 @@
 
 #include "usb.h"
 
+#ifdef CONFIG_PM
+#define MAYBE_CAP_SUSPEND      USBDEVFS_CAP_SUSPEND
+#else
+#define MAYBE_CAP_SUSPEND      0
+#endif
+
 #define USB_MAXBUS                     64
 #define USB_DEVICE_MAX                 (USB_MAXBUS * 128)
 #define USB_SG_SIZE                    16384 /* split-size for large txs */
@@ -2310,7 +2316,8 @@ static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg)
 
        caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
                        USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP |
-                       USBDEVFS_CAP_DROP_PRIVILEGES | USBDEVFS_CAP_CONNINFO_EX;
+                       USBDEVFS_CAP_DROP_PRIVILEGES |
+                       USBDEVFS_CAP_CONNINFO_EX | MAYBE_CAP_SUSPEND;
        if (!ps->dev->bus->no_stop_on_short)
                caps |= USBDEVFS_CAP_BULK_CONTINUATION;
        if (ps->dev->bus->sg_tablesize)

diff --git a/include/uapi/linux/usbdevice_fs.h b/include/uapi/linux/usbdevice_fs.h
index d24bbb6..cf525cd 100644 (file)
--- a/include/uapi/linux/usbdevice_fs.h
+++ b/include/uapi/linux/usbdevice_fs.h
@@ -158,6 +158,7 @@ struct usbdevfs_hub_portinfo {
 #define USBDEVFS_CAP_MMAP                      0x20
 #define USBDEVFS_CAP_DROP_PRIVILEGES           0x40
 #define USBDEVFS_CAP_CONNINFO_EX               0x80
+#define USBDEVFS_CAP_SUSPEND                   0x100
 
 /* USBDEVFS_DISCONNECT_CLAIM flags & struct */