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USB: usbfs: Add a capability flag for runtime suspend 

The recent commit 7794f486ed ("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>
This commit is contained in:
Alan Stern 2019-08-13 16:15:38 -04:00 committed by Greg Kroah-Hartman
parent 115f3bad1a
commit 4ed3350539
2 changed files with 9 additions and 1 deletions
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9
drivers/usb/core/devio.c
View File

@ -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)

1
include/uapi/linux/usbdevice_fs.h
View File

@ -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 */