usbip: move usbip userspace code out of staging

At this point, USB/IP userspace code is fully functional
and can be moved out of staging.

Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/tools/usb/usbip/libsrc/sysfs_utils.c b/tools/usb/usbip/libsrc/sysfs_utils.c
new file mode 100644
index 000000000000..36ac88ece0b8
--- /dev/null
+++ b/tools/usb/usbip/libsrc/sysfs_utils.c
@@ -0,0 +1,31 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "sysfs_utils.h"
+#include "usbip_common.h"
+
+int write_sysfs_attribute(const char *attr_path, const char *new_value,
+                          size_t len)
+{
+        int fd;
+        int length;
+
+        fd = open(attr_path, O_WRONLY);
+        if (fd < 0) {
+                dbg("error opening attribute %s", attr_path);
+                return -1;
+        }
+
+        length = write(fd, new_value, len);
+        if (length < 0) {
+                dbg("error writing to attribute %s", attr_path);
+                close(fd);
+                return -1;
+        }
+
+        close(fd);
+
+        return 0;
+}