HID: make debugging output runtime-configurable

There have been many reports recently about broken HID devices, the
diagnosis of which required users to recompile their kernels in order
to be able to provide debugging output needed for coding a quirk for
a particular device.

This patch makes CONFIG_HID_DEBUG default y if !EMBEDDED and makes it
possible to control debugging output produced by HID code by supplying
'debug=1' module parameter.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

7 files changed, 34 insertions, 40 deletions

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index d91b9dac6df..1eb2c64bc44 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -127,7 +127,7 @@ static void hid_reset(struct work_struct *work)
 			hid_io_error(hid);
 		break;
 	default:
-		err("can't reset device, %s-%s/input%d, status %d",
+		err_hid("can't reset device, %s-%s/input%d, status %d",
 				hid_to_usb_dev(hid)->bus->bus_name,
 				hid_to_usb_dev(hid)->devpath,
 				usbhid->ifnum, rc);
@@ -220,7 +220,7 @@ static void hid_irq_in(struct urb *urb)
 	if (status) {
 		clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 		if (status != -EPERM) {
-			err("can't resubmit intr, %s-%s/input%d, status %d",
+			err_hid("can't resubmit intr, %s-%s/input%d, status %d",
 					hid_to_usb_dev(hid)->bus->bus_name,
 					hid_to_usb_dev(hid)->devpath,
 					usbhid->ifnum, status);
@@ -240,10 +240,10 @@ static int hid_submit_out(struct hid_device *hid)
 	usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 	usbhid->urbout->dev = hid_to_usb_dev(hid);
 
-	dbg("submitting out urb");
+	dbg_hid("submitting out urb\n");
 
 	if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
-		err("usb_submit_urb(out) failed");
+		err_hid("usb_submit_urb(out) failed");
 		return -1;
 	}
 
@@ -287,12 +287,12 @@ static int hid_submit_ctrl(struct hid_device *hid)
 	usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
 	usbhid->cr->wLength = cpu_to_le16(len);
 
-	dbg("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u",
+	dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
 		usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
 		usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
 
 	if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
-		err("usb_submit_urb(ctrl) failed");
+		err_hid("usb_submit_urb(ctrl) failed");
 		return -1;
 	}
 
@@ -474,7 +474,7 @@ int usbhid_wait_io(struct hid_device *hid)
 	if (!wait_event_timeout(hid->wait, (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
 					!test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
 					10*HZ)) {
-		dbg("timeout waiting for ctrl or out queue to clear");
+		dbg_hid("timeout waiting for ctrl or out queue to clear\n");
 		return -1;
 	}
 
@@ -667,7 +667,7 @@ static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
 				 USB_CTRL_GET_TIMEOUT);
 
 	if (result < 0)
-		err("%s failed: %d\n", __func__, result);
+		err_hid("%s failed: %d\n", __func__, result);
 
 	kfree(buf);
 }
@@ -746,7 +746,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 	if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
 	    (!interface->desc.bNumEndpoints ||
 	     usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
-		dbg("class descriptor not present\n");
+		dbg_hid("class descriptor not present\n");
 		return NULL;
 	}
 
@@ -755,19 +755,19 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 			rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
 
 	if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
-		dbg("weird size of report descriptor (%u)", rsize);
+		dbg_hid("weird size of report descriptor (%u)\n", rsize);
 		return NULL;
 	}
 
 	if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
-		dbg("couldn't allocate rdesc memory");
+		dbg_hid("couldn't allocate rdesc memory\n");
 		return NULL;
 	}
 
 	hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
 
 	if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
-		dbg("reading report descriptor failed");
+		dbg_hid("reading report descriptor failed\n");
 		kfree(rdesc);
 		return NULL;
 	}
@@ -781,15 +781,13 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 	if (quirks & HID_QUIRK_SWAPPED_MIN_MAX)
 		hid_fixup_cypress_descriptor(rdesc, rsize);
 
-#ifdef CONFIG_HID_DEBUG
-	printk(KERN_DEBUG __FILE__ ": report descriptor (size %u, read %d) = ", rsize, n);
+	dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
 	for (n = 0; n < rsize; n++)
-		printk(" %02x", (unsigned char) rdesc[n]);
-	printk("\n");
-#endif
+		dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
+	dbg_hid_line("\n");
 
 	if (!(hid = hid_parse_report(rdesc, n))) {
-		dbg("parsing report descriptor failed");
+		dbg_hid("parsing report descriptor failed\n");
 		kfree(rdesc);
 		return NULL;
 	}
@@ -861,7 +859,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 	}
 
 	if (!usbhid->urbin) {
-		err("couldn't find an input interrupt endpoint");
+		err_hid("couldn't find an input interrupt endpoint");
 		goto fail;
 	}
 
@@ -978,7 +976,7 @@ static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	int i;
 	char *c;
 
-	dbg("HID probe called for ifnum %d",
+	dbg_hid("HID probe called for ifnum %d\n",
 			intf->altsetting->desc.bInterfaceNumber);
 
 	if (!(hid = usb_hid_configure(intf)))
diff --git a/drivers/hid/usbhid/hid-lgff.c b/drivers/hid/usbhid/hid-lgff.c
index c5cd4107d6a..4b7ab6a46d9 100644
--- a/drivers/hid/usbhid/hid-lgff.c
+++ b/drivers/hid/usbhid/hid-lgff.c
@@ -78,7 +78,7 @@ static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *ef
 		report->field[0]->value[1] = 0x08;
 		report->field[0]->value[2] = x;
 		report->field[0]->value[3] = y;
-		dbg("(x, y)=(%04x, %04x)", x, y);
+		dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
 		usbhid_submit_report(hid, report, USB_DIR_OUT);
 		break;
 
@@ -93,7 +93,7 @@ static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *ef
 		report->field[0]->value[1] = 0x00;
 		report->field[0]->value[2] = left;
 		report->field[0]->value[3] = right;
-		dbg("(left, right)=(%04x, %04x)", left, right);
+		dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
 		usbhid_submit_report(hid, report, USB_DIR_OUT);
 		break;
 	}
@@ -113,20 +113,20 @@ int hid_lgff_init(struct hid_device* hid)
 
 	/* Find the report to use */
 	if (list_empty(report_list)) {
-		err("No output report found");
+		err_hid("No output report found");
 		return -1;
 	}
 
 	/* Check that the report looks ok */
 	report = list_entry(report_list->next, struct hid_report, list);
 	if (!report) {
-		err("NULL output report");
+		err_hid("NULL output report");
 		return -1;
 	}
 
 	field = report->field[0];
 	if (!field) {
-		err("NULL field");
+		err_hid("NULL field");
 		return -1;
 	}
 
diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
index f6c4145dc20..a418ebfe39b 100644
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -493,7 +493,7 @@ static struct hid_blacklist *usbhid_exists_dquirk(const u16 idVendor,
 	}
 
 	if (bl_entry != NULL)
-		dbg("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
+		dbg_hid("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
 				bl_entry->quirks, bl_entry->idVendor,
 				bl_entry->idProduct);
 
@@ -521,13 +521,13 @@ int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct,
 	int list_edited = 0;
 
 	if (!idVendor) {
-		dbg("Cannot add a quirk with idVendor = 0");
+		dbg_hid("Cannot add a quirk with idVendor = 0\n");
 		return -EINVAL;
 	}
 
 	q_new = kmalloc(sizeof(struct quirks_list_struct), GFP_KERNEL);
 	if (!q_new) {
-		dbg("Could not allocate quirks_list_struct");
+		dbg_hid("Could not allocate quirks_list_struct\n");
 		return -ENOMEM;
 	}
 
@@ -643,7 +643,7 @@ static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
 			bl_entry = &hid_blacklist[n];
 
 	if (bl_entry != NULL)
-		dbg("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
+		dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
 				bl_entry->quirks, bl_entry->idVendor, 
 				bl_entry->idProduct);
 	return bl_entry;
diff --git a/drivers/hid/usbhid/hid-tmff.c b/drivers/hid/usbhid/hid-tmff.c
index ab5ba6ef891..555bb48b429 100644
--- a/drivers/hid/usbhid/hid-tmff.c
+++ b/drivers/hid/usbhid/hid-tmff.c
@@ -70,7 +70,7 @@ static int hid_tmff_play(struct input_dev *dev, void *data, struct ff_effect *ef
 
 	tmff->rumble->value[0] = left;
 	tmff->rumble->value[1] = right;
-	dbg("(left,right)=(%08x, %08x)", left, right);
+	dbg_hid("(left,right)=(%08x, %08x)\n", left, right);
 	usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
 
 	return 0;
diff --git a/drivers/hid/usbhid/hid-zpff.c b/drivers/hid/usbhid/hid-zpff.c
index a7fbffcdaf3..5a688274f6a 100644
--- a/drivers/hid/usbhid/hid-zpff.c
+++ b/drivers/hid/usbhid/hid-zpff.c
@@ -21,10 +21,6 @@
  */
 
 
-/* #define DEBUG */
-
-#define debug(format, arg...) pr_debug("hid-zpff: " format "\n" , ## arg)
-
 #include <linux/input.h>
 #include <linux/usb.h>
 #include <linux/hid.h>
@@ -49,14 +45,14 @@ static int hid_zpff_play(struct input_dev *dev, void *data,
 
 	left = effect->u.rumble.strong_magnitude;
 	right = effect->u.rumble.weak_magnitude;
-	debug("called with 0x%04x 0x%04x", left, right);
+	dbg_hid("called with 0x%04x 0x%04x\n", left, right);
 
 	left = left * 0x7f / 0xffff;
 	right = right * 0x7f / 0xffff;
 
 	zpff->report->field[2]->value[0] = left;
 	zpff->report->field[3]->value[0] = right;
-	debug("running with 0x%02x 0x%02x", left, right);
+	dbg_hid("running with 0x%02x 0x%02x\n", left, right);
 	usbhid_submit_report(hid, zpff->report, USB_DIR_OUT);
 
 	return 0;
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 488d61bdbf2..e793127f971 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -779,7 +779,7 @@ int hiddev_connect(struct hid_device *hid)
 
 	retval = usb_register_dev(usbhid->intf, &hiddev_class);
 	if (retval) {
-		err("Not able to get a minor for this device.");
+		err_hid("Not able to get a minor for this device.");
 		kfree(hiddev);
 		return -1;
 	}
diff --git a/drivers/hid/usbhid/usbkbd.c b/drivers/hid/usbhid/usbkbd.c
index 13097878071..b76b02f7b52 100644
--- a/drivers/hid/usbhid/usbkbd.c
+++ b/drivers/hid/usbhid/usbkbd.c
@@ -125,7 +125,7 @@ static void usb_kbd_irq(struct urb *urb)
 resubmit:
 	i = usb_submit_urb (urb, GFP_ATOMIC);
 	if (i)
-		err ("can't resubmit intr, %s-%s/input0, status %d",
+		err_hid ("can't resubmit intr, %s-%s/input0, status %d",
 				kbd->usbdev->bus->bus_name,
 				kbd->usbdev->devpath, i);
 }
@@ -151,7 +151,7 @@ static int usb_kbd_event(struct input_dev *dev, unsigned int type,
 	*(kbd->leds) = kbd->newleds;
 	kbd->led->dev = kbd->usbdev;
 	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
-		err("usb_submit_urb(leds) failed");
+		err_hid("usb_submit_urb(leds) failed");
 
 	return 0;
 }
@@ -169,7 +169,7 @@ static void usb_kbd_led(struct urb *urb)
 	*(kbd->leds) = kbd->newleds;
 	kbd->led->dev = kbd->usbdev;
 	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
-		err("usb_submit_urb(leds) failed");
+		err_hid("usb_submit_urb(leds) failed");
 }
 
 static int usb_kbd_open(struct input_dev *dev)