[PATCH v3] staging: usbip: replace pr_warning() with dev_warn().

[navin patidar]

dev_warn() is preferred over pr_warning().

container_of() is used to get usb_driver pointer from usbip_device container
(stub_device or vhci_device), to get device structure required for dev_warn().

Signed-off-by: navin patidar <navinp@xxxxxxx>
---
 drivers/staging/usbip/usbip_event.c |   17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/usbip/usbip_event.c b/drivers/staging/usbip/usbip_event.c
index 82123be..eca14b7 100644
--- a/drivers/staging/usbip/usbip_event.c
+++ b/drivers/staging/usbip/usbip_event.c
@@ -21,6 +21,8 @@
 #include <linux/export.h>

 #include "usbip_common.h"
+#include "stub.h"
+#include "vhci.h"

 static int event_handler(struct usbip_device *ud)
 {
@@ -85,7 +87,20 @@ int usbip_start_eh(struct usbip_device *ud)

 	ud->eh = kthread_run(event_handler_loop, ud, "usbip_eh");
 	if (IS_ERR(ud->eh)) {
-		pr_warning("Unable to start control thread\n");
+		struct device dev;
+
+		if (ud->side == USBIP_STUB) {
+			struct stub_device *sdev;
+
+			sdev = container_of(ud, struct stub_device, ud);
+			dev = sdev->udev->dev;
+		} else {
+			struct vhci_device *vdev;
+
+			vdev = container_of(ud, struct vhci_device, ud);
+			dev = vdev->udev->dev;
+		}
+		dev_warn(&dev, "Unable to start control thread\n");
 		return PTR_ERR(ud->eh);
 	}

--
1.7.10.4

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