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Message-Id: <200812101042.17530.laurent.pinchart@skynet.be>
Date: Wed, 10 Dec 2008 10:42:17 +0100
From: Laurent Pinchart <laurent.pinchart@...net.be>
To: Wu Fengguang <fengguang.wu@...el.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...e.de>, linux-usb@...r.kernel.org
Subject: Re: [PATCH] usb: make printk messges more searchable
Hi Wu,
On Wednesday 10 December 2008, Wu Fengguang wrote:
> Make USB printk messages long and straightforward. One of these
> decorated USB error messages cost me some smart efforts to locate.
That would make the code break the 80 columns limit.
>From "Documentation/CodingStyle":
"The limit on the length of lines is 80 columns and this is a strongly
preferred limit."
Best regards,
Laurent Pinchart
> Cc: Greg Kroah-Hartman <gregkh@...e.de>
> Signed-off-by: Wu Fengguang <fengguang.wu@...el.com>
> ---
> drivers/usb/core/hub.c | 89 ++++++++++++++++++---------------------
> 1 file changed, 43 insertions(+), 46 deletions(-)
>
> --- linux-2.6.orig/drivers/usb/core/hub.c
> +++ linux-2.6/drivers/usb/core/hub.c
> @@ -107,7 +107,8 @@ MODULE_PARM_DESC (blinkenlights, "true t
> /* define initial 64-byte descriptor request timeout in milliseconds */
> static int initial_descriptor_timeout = USB_CTRL_GET_TIMEOUT;
> module_param(initial_descriptor_timeout, int, S_IRUGO|S_IWUSR);
> -MODULE_PARM_DESC(initial_descriptor_timeout, "initial 64-byte descriptor
> request timeout in milliseconds (default 5000 - 5.0 seconds)");
> +MODULE_PARM_DESC(initial_descriptor_timeout,
> + "initial 64-byte descriptor request timeout in milliseconds (default
> 5000 - 5.0 seconds)");
>
> /*
> * As of 2.6.10 we introduce a new USB device initialization scheme which
> @@ -131,8 +132,7 @@ MODULE_PARM_DESC(old_scheme_first,
> static int use_both_schemes = 1;
> module_param(use_both_schemes, bool, S_IRUGO | S_IWUSR);
> MODULE_PARM_DESC(use_both_schemes,
> - "try the other device initialization scheme if the "
> - "first one fails");
> + "try the other device initialization scheme if the first one fails");
>
> /* Mutual exclusion for EHCI CF initialization. This interferes with
> * port reset on some companion controllers.
> @@ -545,8 +545,7 @@ static unsigned hub_power_on(struct usb_
> if ((wHubCharacteristics & HUB_CHAR_LPSM) < 2)
> dev_dbg(hub->intfdev, "enabling power on all ports\n");
> else
> - dev_dbg(hub->intfdev, "trying to enable port power on "
> - "non-switchable hub\n");
> + dev_dbg(hub->intfdev, "trying to enable port power on non-switchable
> hub\n"); for (port1 = 1; port1 <= hub->descriptor->bNbrPorts; port1++)
> set_port_feature(hub->hdev, port1, USB_PORT_FEAT_POWER);
>
> @@ -1020,8 +1019,7 @@ static int hub_configure(struct usb_hub
>
> if (remaining < hdev->maxchild * 100)
> dev_warn(hub_dev,
> - "insufficient power available "
> - "to use all downstream ports\n");
> + "insufficient power available to use all downstream ports\n");
> hub->mA_per_port = 100; /* 7.2.1.1 */
> }
> } else { /* Self-powered external hub */
> @@ -1136,8 +1134,8 @@ static int hub_probe(struct usb_interfac
> hdev = interface_to_usbdev(intf);
>
> if (hdev->level == MAX_TOPO_LEVEL) {
> - dev_err(&intf->dev, "Unsupported bus topology: "
> - "hub nested too deep\n");
> + dev_err(&intf->dev,
> + "Unsupported bus topology: hub nested too deep\n");
> return -E2BIG;
> }
>
> @@ -1476,8 +1474,8 @@ static void announce_device(struct usb_d
> dev_info(&udev->dev, "New USB device found, idVendor=%04x,
> idProduct=%04x\n", le16_to_cpu(udev->descriptor.idVendor),
> le16_to_cpu(udev->descriptor.idProduct));
> - dev_info(&udev->dev, "New USB device strings: Mfr=%d, Product=%d, "
> - "SerialNumber=%d\n",
> + dev_info(&udev->dev,
> + "New USB device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
> udev->descriptor.iManufacturer,
> udev->descriptor.iProduct,
> udev->descriptor.iSerialNumber);
> @@ -1542,7 +1540,7 @@ static int usb_configure_device_otg(stru
> * customize to match your product.
> */
> dev_info(&udev->dev,
> - "can't set HNP mode; %d\n",
> + "can't set HNP mode: %d\n",
> err);
> bus->b_hnp_enable = 0;
> }
> @@ -1723,8 +1721,9 @@ int usb_authorize_device(struct usb_devi
> }
> result = usb_get_device_descriptor(usb_dev, sizeof(usb_dev->descriptor));
> if (result < 0) {
> - dev_err(&usb_dev->dev, "can't re-read device descriptor for "
> - "authorization: %d\n", result);
> + dev_err(&usb_dev->dev,
> + "can't re-read device descriptor for authorization: %d\n",
> + result);
> goto error_device_descriptor;
> }
> usb_dev->authorized = 1;
> @@ -2020,8 +2019,8 @@ int usb_port_suspend(struct usb_device *
> USB_CTRL_SET_TIMEOUT);
> } else {
> /* device has up to 10 msec to fully suspend */
> - dev_dbg(&udev->dev, "usb %ssuspend\n",
> - udev->auto_pm ? "auto-" : "");
> + dev_dbg(&udev->dev, "%s\n",
> + udev->auto_pm ? "usb auto-suspend" : "usb suspend");
> usb_set_device_state(udev, USB_STATE_SUSPENDED);
> msleep(10);
> }
> @@ -2045,8 +2044,8 @@ static int finish_port_resume(struct usb
> u16 devstatus;
>
> /* caller owns the udev device lock */
> - dev_dbg(&udev->dev, "finish %sresume\n",
> - udev->reset_resume ? "reset-" : "");
> + dev_dbg(&udev->dev, "%s\n",
> + udev->reset_resume ? "finish reset-resume" : "finish resume");
>
> /* usb ch9 identifies four variants of SUSPENDED, based on what
> * state the device resumes to. Linux currently won't see the
> @@ -2098,8 +2097,9 @@ static int finish_port_resume(struct usb
> NULL, 0,
> USB_CTRL_SET_TIMEOUT);
> if (status)
> - dev_dbg(&udev->dev, "disable remote "
> - "wakeup, status %d\n", status);
> + dev_dbg(&udev->dev,
> + "disable remote wakeup, status %d\n",
> + status);
> }
> status = 0;
> }
> @@ -2582,9 +2582,9 @@ hub_port_init (struct usb_hub *hub, stru
> goto fail;
> }
> if (r) {
> - dev_err(&udev->dev, "device descriptor "
> - "read/%s, error %d\n",
> - "64", r);
> + dev_err(&udev->dev,
> + "device descriptor read/64, error %d\n",
> + r);
> retval = -EMSGSIZE;
> continue;
> }
> @@ -2621,9 +2621,9 @@ hub_port_init (struct usb_hub *hub, stru
>
> retval = usb_get_device_descriptor(udev, 8);
> if (retval < 8) {
> - dev_err(&udev->dev, "device descriptor "
> - "read/%s, error %d\n",
> - "8", retval);
> + dev_err(&udev->dev,
> + "device descriptor read/8, error %d\n",
> + retval);
> if (retval >= 0)
> retval = -EMSGSIZE;
> } else {
> @@ -2650,8 +2650,8 @@ hub_port_init (struct usb_hub *hub, stru
>
> retval = usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE);
> if (retval < (signed)sizeof(udev->descriptor)) {
> - dev_err(&udev->dev, "device descriptor read/%s, error %d\n",
> - "all", retval);
> + dev_err(&udev->dev, "device descriptor read/all, error %d\n",
> + retval);
> if (retval >= 0)
> retval = -ENOMSG;
> goto fail;
> @@ -2681,8 +2681,8 @@ check_highspeed (struct usb_hub *hub, st
> status = usb_get_descriptor (udev, USB_DT_DEVICE_QUALIFIER, 0,
> qual, sizeof *qual);
> if (status == sizeof *qual) {
> - dev_info(&udev->dev, "not running at top speed; "
> - "connect to a high speed hub\n");
> + dev_info(&udev->dev,
> + "not running at top speed; connect to a high speed hub\n");
> /* hub LEDs are probably harder to miss than syslog */
> if (hub->has_indicators) {
> hub->indicator[port1-1] = INDICATOR_GREEN_BLINK;
> @@ -2719,9 +2719,9 @@ hub_power_remaining (struct usb_hub *hub
> else
> delta = 8;
> if (delta > hub->mA_per_port)
> - dev_warn(&udev->dev, "%dmA is over %umA budget "
> - "for port %d!\n",
> - delta, hub->mA_per_port, port1);
> + dev_warn(&udev->dev,
> + "%dmA is over %umA budget for port %d!\n",
> + delta, hub->mA_per_port, port1);
> remaining -= delta;
> }
> if (remaining < 0) {
> @@ -2812,8 +2812,9 @@ static void hub_port_connect_change(stru
> status = hub_port_debounce(hub, port1);
> if (status < 0) {
> if (printk_ratelimit())
> - dev_err(hub_dev, "connect-debounce failed, "
> - "port %d disabled\n", port1);
> + dev_err(hub_dev,
> + "connect-debounce failed, port %d disabled\n",
> + port1);
> portstatus &= ~USB_PORT_STAT_CONNECTION;
> } else {
> portstatus = status;
> @@ -2883,8 +2884,7 @@ static void hub_port_connect_change(stru
> le16_to_cpus(&devstat);
> if ((devstat & (1 << USB_DEVICE_SELF_POWERED)) == 0) {
> dev_err(&udev->dev,
> - "can't connect bus-powered hub "
> - "to this port\n");
> + "can't connect bus-powered hub to this port\n");
> if (hub->has_indicators) {
> hub->indicator[port1-1] =
> INDICATOR_AMBER_BLINK;
> @@ -3067,9 +3067,8 @@ static void hub_events(void)
> if (portchange & USB_PORT_STAT_C_ENABLE) {
> if (!connect_change)
> dev_dbg (hub_dev,
> - "port %d enable change, "
> - "status %08x\n",
> - i, portstatus);
> + "port %d enable change, status %08x\n",
> + i, portstatus);
> clear_port_feature(hdev, i,
> USB_PORT_FEAT_C_ENABLE);
>
> @@ -3083,10 +3082,8 @@ static void hub_events(void)
> && !connect_change
> && hdev->children[i-1]) {
> dev_err (hub_dev,
> - "port %i "
> - "disabled by hub (EMI?), "
> - "re-enabling...\n",
> - i);
> + "port %i disabled by hub (EMI?), re-enabling...\n",
> + i);
> connect_change = 1;
> }
> }
> @@ -3420,8 +3417,8 @@ static int usb_reset_and_verify_device(s
> ret = usb_set_interface(udev, desc->bInterfaceNumber,
> desc->bAlternateSetting);
> if (ret < 0) {
> - dev_err(&udev->dev, "failed to restore interface %d "
> - "altsetting %d (error=%d)\n",
> + dev_err(&udev->dev,
> + "failed to restore interface %d altsetting %d (error=%d)\n",
> desc->bInterfaceNumber,
> desc->bAlternateSetting,
> ret);
> --
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