linux-kernel - Re: [PATCH] usb: don't hide bios bug warning

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Message-ID: <86802c440807261848g3bb3e87dh121d1f11f6f64d77@mail.gmail.com>
Date:	Sat, 26 Jul 2008 18:48:05 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Greg KH" <gregkh@...e.de>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: don't hide bios bug warning

On Sat, Jul 26, 2008 at 6:24 PM, Greg KH <gregkh@...e.de> wrote:
> On Sat, Jul 26, 2008 at 06:12:15PM -0700, Yinghai Lu wrote:
>>
>> quirk_usb_disable_handoff will wait a while if there is BIOS bug.
>> let the end user know the reason for that.
>>
>> Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
>>
>> ---
>>  drivers/usb/host/pci-quirks.c |    9 ++++++---
>>  1 file changed, 6 insertions(+), 3 deletions(-)
>>
>> Index: linux-2.6/drivers/usb/host/pci-quirks.c
>> ===================================================================
>> --- linux-2.6.orig/drivers/usb/host/pci-quirks.c
>> +++ linux-2.6/drivers/usb/host/pci-quirks.c
>> @@ -190,7 +190,8 @@ static void __devinit quirk_usb_handoff_
>>                       msleep(10);
>>               }
>>               if (wait_time <= 0)
>> -                     dev_warn(&pdev->dev, "OHCI: BIOS handoff failed"
>> +                     dev_printk(KERN_WARNING, &pdev->dev,
>> +                                     "OHCI: BIOS handoff failed"
>
> This is the exact same thing here, no change.
>
>> @@ -242,7 +243,8 @@ static void __devinit quirk_usb_disable_
>>               switch (cap & 0xff) {
>>               case 1:                 /* BIOS/SMM/... handoff support */
>>                       if ((cap & EHCI_USBLEGSUP_BIOS)) {
>> -                             dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n");
>> +                             dev_printk(KERN_DEBUG, &pdev->dev,
>> +                                             "EHCI: BIOS handoff\n");
>
> Is this what you really want to see?  But you just made things noiser.
>
>> @@ -283,7 +285,8 @@ static void __devinit quirk_usb_disable_
>>                               /* well, possibly buggy BIOS... try to shut
>>                                * it down, and hope nothing goes too wrong
>>                                */
>> -                             dev_warn(&pdev->dev, "EHCI: BIOS handoff failed"
>> +                             dev_printk(KERN_WARNING, &pdev->dev,
>> +                                             "EHCI: BIOS handoff failed"
>
> This is the exact same thing, no change.
>
> confused,

end user will not set CONFIG_USB_DEBUG, so that dev_warn will do nothing.

YH
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