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Date: Thu, 24 Sep 2015 00:44:28 +0100
From: Eric Curtin <ericcurtin17@...il.com>
To: USB list <linux-usb@...r.kernel.org>
Cc: jikos@...nel.org,
Kernel development list <linux-kernel@...r.kernel.org>
Subject: Problems with printk logs and my driver
Hi Guys,
Just wondering what I am doing wrong. I can't see my logs. I figured
out what driver is used for my keyboard and started adding logging:
[curtine@...alhost ~]$ sudo lsusb -v | grep eyboard -B 13
Bus 001 Device 003: ID 04ca:008d Lite-On Technology Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 32
idVendor 0x04ca Lite-On Technology Corp.
idProduct 0x008d
bcdDevice 0.39
iManufacturer 1 Lite-On Technology Corp.
iProduct 2 HP Wireless Keyboard Kit
--
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
[curtine@...alhost ~]$ sudo lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 480M
|__ Port 4: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 4: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 7: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 7: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 7: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 9: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 9: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
So, first I added a little logging and then some more, but I can't see
any of it (see patch at bottom of email, I used KERN_EMERG, it's just
temporary logging).
I'm think I'm doing most things right, this is how I compile my code I
wrote a little script (I'm on fedora):
#!/bin/sh
find /boot -name '*4.3*' | xargs sudo rm -rf
find /lib/modules -name '*4.3*' | xargs sudo rm -rf
set -e
cd $HOME/git/linux
# make -j5 oldconfig
printf "completed 1\n"
make -j5 bzImage
printf "completed 2\n"
make -j5 modules
printf "completed 3\n"
sudo make -j5 modules_install
printf "completed 4\n"
sudo make -j5 install
I reboot, load new kernel, blah blah. When I type keys I don't see my
logs in dmesg, I don't see them in /var/log/messages either, I don't
see them in /home/curtine/log.log either when I do a:
sudo killall klogd
sudo /sbin/klogd -f /home/curtine/log.log
What am I doing wrong here?
Also, as regards etiquette on these mailing lists, is it ok to
regularly cc linux-kernel@...r.kernel.org?
diff --git a/drivers/hid/usbhid/usbkbd.c b/drivers/hid/usbhid/usbkbd.c
index 9a332e6..2038d94 100644
--- a/drivers/hid/usbhid/usbkbd.c
+++ b/drivers/hid/usbhid/usbkbd.c
@@ -112,6 +112,7 @@ struct usb_kbd {
static void usb_kbd_irq(struct urb *urb)
{
+ printk(KERN_EMERG "usb_kbd_irq");
struct usb_kbd *kbd = urb->context;
int i;
@@ -166,6 +167,7 @@ resubmit:
static int usb_kbd_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
+ printk(KERN_EMERG "usb_kbd_event");
unsigned long flags;
struct usb_kbd *kbd = input_get_drvdata(dev);
@@ -202,6 +204,7 @@ static int usb_kbd_event(struct input_dev *dev,
unsigned int type,
static void usb_kbd_led(struct urb *urb)
{
+ printk(KERN_EMERG "usb_kbd_led");
unsigned long flags;
struct usb_kbd *kbd = urb->context;
@@ -230,6 +233,7 @@ static void usb_kbd_led(struct urb *urb)
static int usb_kbd_open(struct input_dev *dev)
{
+ printk(KERN_EMERG "usb_kbd_open");
struct usb_kbd *kbd = input_get_drvdata(dev);
kbd->irq->dev = kbd->usbdev;
@@ -241,6 +245,7 @@ static int usb_kbd_open(struct input_dev *dev)
static void usb_kbd_close(struct input_dev *dev)
{
+ printk(KERN_EMERG "usb_kbd_close");
struct usb_kbd *kbd = input_get_drvdata(dev);
usb_kill_urb(kbd->irq);
@@ -248,6 +253,7 @@ static void usb_kbd_close(struct input_dev *dev)
static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
+ printk(KERN_EMERG "usb_kbd_alloc_mem");
if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
return -1;
if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
@@ -264,6 +270,7 @@ static int usb_kbd_alloc_mem(struct usb_device
*dev, struct usb_kbd *kbd)
static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
+ printk(KERN_EMERG "usb_kbd_free_mem");
usb_free_urb(kbd->irq);
usb_free_urb(kbd->led);
usb_free_coherent(dev, 8, kbd->new, kbd->new_dma);
@@ -274,6 +281,7 @@ static void usb_kbd_free_mem(struct usb_device
*dev, struct usb_kbd *kbd)
static int usb_kbd_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
+ printk(KERN_EMERG "usb_kbd_probe");
struct usb_device *dev = interface_to_usbdev(iface);
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
@@ -381,6 +389,7 @@ fail1:
static void usb_kbd_disconnect(struct usb_interface *intf)
{
+ printk(KERN_EMERG "usb_kbd_disconnect");
struct usb_kbd *kbd = usb_get_intfdata (intf);
usb_set_intfdata(intf, NULL);
--
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