linux-kernel - Re: [PATCH] staging/comedi: Use pr_ or dev_ printks in drivers/gsc

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Date:	Thu, 25 Oct 2012 19:50:21 +0900
From:	Toshiaki Yamane <yamanetoshi@...il.com>
To:	Greg Kroah-Hartman <greg@...ah.com>
Cc:	Ian Abbott <abbotti@....co.uk>,
	Frank Mori Hess <fmhess@...rs.sourceforge.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging/comedi: Use pr_ or dev_ printks in drivers/gsc_hdpi.c

On Tue, Oct 23, 2012 at 4:52 AM, Greg Kroah-Hartman <greg@...ah.com> wrote:
> On Wed, Oct 10, 2012 at 09:20:59PM +0900, YAMANE Toshiaki wrote:
>> fixed below checkpatch warning.
>> - WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
>>
>> and added pr_fmt.
>>
>> Signed-off-by: YAMANE Toshiaki <yamanetoshi@...il.com>
>> ---
>>  drivers/staging/comedi/drivers/gsc_hpdi.c |   31 +++++++++++++++--------------
>>  1 file changed, 16 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c
>> index abff660..30a27fd 100644
>> --- a/drivers/staging/comedi/drivers/gsc_hpdi.c
>> +++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
>> @@ -45,6 +45,8 @@ support could be added to this driver.
>>
>>  */
>>
>> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>> +
>>  #include <linux/interrupt.h>
>>  #include "../comedidev.h"
>>  #include <linux/delay.h>
>> @@ -107,8 +109,7 @@ enum hpdi_registers {
>>  int command_channel_valid(unsigned int channel)
>>  {
>>       if (channel == 0 || channel > 6) {
>> -             printk(KERN_WARNING
>> -                    "gsc_hpdi: bug! invalid cable command channel\n");
>> +             pr_warn("bug! invalid cable command channel\n");
>>               return 0;
>>       }
>>       return 1;
>> @@ -553,7 +554,7 @@ static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
>>       int i;
>>       int retval;
>>
>> -     printk(KERN_WARNING "comedi%d: gsc_hpdi\n", dev->minor);
>> +     dev_warn(dev->class_dev, "gsc_hpdi\n");
>
> What is this warning about?
>
>>
>>       if (alloc_private(dev, sizeof(struct hpdi_private)) < 0)
>>               return -ENOMEM;
>> @@ -582,17 +583,17 @@ static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
>>               } while (pcidev != NULL);
>>       }
>>       if (dev->board_ptr == NULL) {
>> -             printk(KERN_WARNING "gsc_hpdi: no hpdi card found\n");
>> +             dev_warn(dev->class_dev, "no hpdi card found\n");
>>               return -EIO;
>>       }
>>
>> -     printk(KERN_WARNING
>> -            "gsc_hpdi: found %s on bus %i, slot %i\n", board(dev)->name,
>> -            pcidev->bus->number, PCI_SLOT(pcidev->devfn));
>> +     dev_warn(dev->class_dev,
>> +              "found %s on bus %i, slot %i\n", board(dev)->name,
>> +              pcidev->bus->number, PCI_SLOT(pcidev->devfn));
>>
>>       if (comedi_pci_enable(pcidev, dev->driver->driver_name)) {
>> -             printk(KERN_WARNING
>> -                    " failed enable PCI device and request regions\n");
>> +             dev_warn(dev->class_dev,
>> +                      " failed enable PCI device and request regions\n");
>>               return -EIO;
>>       }
>>       pci_set_master(pcidev);
>> @@ -613,7 +614,7 @@ static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
>>           ioremap(priv(dev)->hpdi_phys_iobase,
>>                   pci_resource_len(pcidev, HPDI_BADDRINDEX));
>>       if (!priv(dev)->plx9080_iobase || !priv(dev)->hpdi_iobase) {
>> -             printk(KERN_WARNING " failed to remap io memory\n");
>> +             dev_warn(dev->class_dev, "failed to remap io memory\n");
>>               return -ENOMEM;
>>       }
>>
>> @@ -625,13 +626,13 @@ static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
>>       /*  get irq */
>>       if (request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
>>                       dev->driver->driver_name, dev)) {
>> -             printk(KERN_WARNING
>> -                    " unable to allocate irq %u\n", pcidev->irq);
>> +             dev_warn(dev->class_dev,
>> +                      "unable to allocate irq %u\n", pcidev->irq);
>>               return -EINVAL;
>>       }
>>       dev->irq = pcidev->irq;
>>
>> -     printk(KERN_WARNING " irq %u\n", dev->irq);
>> +     dev_warn(dev->class_dev, "irq %u\n", dev->irq);
>
> Again a warning?  Shouldn't most of these be debugging lines instead?
>
> greg k-h

Only two points above should be in debugging line?
Should it modify dev_dbg on 589 also?

>> -     printk(KERN_WARNING
>> -            "gsc_hpdi: found %s on bus %i, slot %i\n", board(dev)->name,
>> -            pcidev->bus->number, PCI_SLOT(pcidev->devfn));
>> +     dev_warn(dev->class_dev,
>> +              "found %s on bus %i, slot %i\n", board(dev)->name,
>> +              pcidev->bus->number, PCI_SLOT(pcidev->devfn));

I am grad to tell me why.

And I will resend the patch only two points are in debugging line.

-- 

Regards,

YAMANE Toshiaki
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