Re: [PATCH] ata-acpi: don't call _GTF for disabled drive

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On Tue, 2008-03-25 at 21:50 +0100, Rafael J. Wysocki wrote:
> On Tuesday, 25 of March 2008, Shaohua Li wrote:
> > I got below log after a S3 resume in a ASUS A6VC laptop. The system has
> > only one IDE drive. It appears there is no reason calling _GTF for
> > disabled drive.
> > 
> > ACPI Error (dsopcode-0483): Attempt to CreateField of length zero [20070126]
> > ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node df822a7c), AE_AML_OPERAND_VALUE
> > ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV0._GTF] (Node df822bd0), AE_AML_OPERAND_VALUE
> > ata2.00: _GTF evaluation failed (AE 0x3006)
> > ACPI Error (dsopcode-0483): Attempt to CreateField of length zero [20070126]
> > ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node df822a7c), AE_AML_OPERAND_VALUE
> > ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV1._GTF] (Node df822b94), AE_AML_OPERAND_VALUE
> > ata2.01: _GTF evaluation failed (AE 0x3006)
> > 
> > Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
> > 
> > diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
> > index bf98a56..7cbf023 100644
> > --- a/drivers/ata/libata-acpi.c
> > +++ b/drivers/ata/libata-acpi.c
> > @@ -839,7 +839,8 @@ void ata_acpi_on_resume(struct ata_port *ap)
> >  		 */
> >  		ata_link_for_each_dev(dev, &ap->link) {
> >  			ata_acpi_clear_gtf(dev);
> 
> Hmm.  What is the effect of calling ata_acpi_clear_gtf() on a disabled device? 
No effect, just free some memory if there is.

Thanks,
Shaohua

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