[PATCH 4/6] usb: usbip tool: Add ncontrollers in vhci_driver structure

[Yuyang Du]

This field is read from the newly added ncontroller sysfs.

Signed-off-by: Yuyang Du <yuyang...@intel.com>
---
 tools/usb/usbip/libsrc/vhci_driver.c | 18 +++++++++++++++++-
 tools/usb/usbip/libsrc/vhci_driver.h |  1 +
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/tools/usb/usbip/libsrc/vhci_driver.c 
b/tools/usb/usbip/libsrc/vhci_driver.c
index 4228b98..d335f04 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.c
+++ b/tools/usb/usbip/libsrc/vhci_driver.c
@@ -134,6 +134,20 @@ static int get_nports(void)
        return strtoul(attr_nports, NULL, 10);
 }
 
+static int get_ncontrollers(void)
+{
+       const char *attr_ncontrollers;
+
+       attr_ncontrollers = 
udev_device_get_sysattr_value(vhci_driver->hc_device,
+                                                         "ncontrollers");
+       if (!attr_ncontrollers) {
+               err("udev_device_get_sysattr_value ncontrollers failed");
+               return -1;
+       }
+
+       return strtoul(attr_ncontrollers, NULL, 10);
+}
+
 /*
  * Read the given port's record.
  *
@@ -220,9 +234,11 @@ int usbip_vhci_driver_open(void)
        }
 
        vhci_driver->nports = get_nports();
-
        dbg("available ports: %d", vhci_driver->nports);
 
+       vhci_driver->ncontrollers = get_ncontrollers();
+       dbg("available controllers: %d", vhci_driver->ncontrollers);
+
        if (refresh_imported_device_list())
                goto err;
 
diff --git a/tools/usb/usbip/libsrc/vhci_driver.h 
b/tools/usb/usbip/libsrc/vhci_driver.h
index fa2316c..33add14 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.h
+++ b/tools/usb/usbip/libsrc/vhci_driver.h
@@ -31,6 +31,7 @@ struct usbip_vhci_driver {
        /* /sys/devices/platform/vhci_hcd */
        struct udev_device *hc_device;
 
+       int ncontrollers;
        int nports;
        struct usbip_imported_device idev[MAXNPORT];
 };
-- 
1.9.1

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