Sergei Shtylyov wrote:
>
> Hello again. :-)
>
> Bartlomiej Zolnierkiewicz wrote:
>
>> [PATCH] ide: make ide_hwif_t.ide_dma_{host_off,off_quietly} void
>
> Below are my nits on the patch itself, and the code it changes.
>
>> Index: b/drivers/ide/pci/atiixp.c
>> ===================================================================
>> --- a/drivers/ide/pci/atiixp.c
>> +++ b/drivers/ide/pci/atiixp.c
>> @@ -121,7 +121,7 @@ static int atiixp_ide_dma_host_on(ide_dr
>> return __ide_dma_host_on(drive);
>> }
>>
>> -static int atiixp_ide_dma_host_off(ide_drive_t *drive)
>> +static void atiixp_ide_dma_host_off(ide_drive_t *drive)
>> {
>> struct pci_dev *dev = drive->hwif->pci_dev;
>> unsigned long flags;
> [...]
>> @@ -306,7 +306,7 @@ static void __devinit init_hwif_atiixp(i
>> hwif->udma_four = 0;
>>
>> hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
>> - hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
>> + hwif->dma_host_off = &atiixp_ide_dma_host_off;
>> hwif->ide_dma_check = &atiixp_dma_check;
>> if (!noautodma)
>> hwif->autodma = 1;
>
> Would seem logical to get rid of ide_ in the function's name also...
done
>> Index: b/drivers/ide/pci/sgiioc4.c
>> ===================================================================
>> --- a/drivers/ide/pci/sgiioc4.c
>> +++ b/drivers/ide/pci/sgiioc4.c
>> @@ -282,12 +282,11 @@ sgiioc4_ide_dma_on(ide_drive_t * drive)
>> return HWIF(drive)->ide_dma_host_on(drive);
>> }
>>
>> -static int
>> -sgiioc4_ide_dma_off_quietly(ide_drive_t * drive)
>> +static void sgiioc4_ide_dma_off_quietly(ide_drive_t *drive)
>> {
>> drive->using_dma = 0;
>>
>> - return HWIF(drive)->ide_dma_host_off(drive);
>> + drive->hwif->dma_host_off(drive);
>> }
>>
>> static int sgiioc4_ide_dma_check(ide_drive_t *drive)
>> @@ -317,12 +316,9 @@ sgiioc4_ide_dma_host_on(ide_drive_t * dr
>> return 1;
>> }
>>
>> -static int
>> -sgiioc4_ide_dma_host_off(ide_drive_t * drive)
>> +static void sgiioc4_ide_dma_host_off(ide_drive_t * drive)
>> {
>> sgiioc4_clearirq(drive);
>> -
>> - return 0;
>> }
>>
>> static int
>> @@ -612,10 +608,10 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
>> hwif->ide_dma_end = &sgiioc4_ide_dma_end;
>> hwif->ide_dma_check = &sgiioc4_ide_dma_check;
>> hwif->ide_dma_on = &sgiioc4_ide_dma_on;
>> - hwif->ide_dma_off_quietly = &sgiioc4_ide_dma_off_quietly;
>> + hwif->dma_off_quietly = &sgiioc4_ide_dma_off_quietly;
>> hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq;
>> hwif->ide_dma_host_on = &sgiioc4_ide_dma_host_on;
>> - hwif->ide_dma_host_off = &sgiioc4_ide_dma_host_off;
>> + hwif->dma_host_off = &sgiioc4_ide_dma_host_off;
>> hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq;
>> hwif->ide_dma_timeout = &__ide_dma_timeout;
>
> The same here...
done
>> Index: b/drivers/ide/pci/sl82c105.c
>> ===================================================================
>> --- a/drivers/ide/pci/sl82c105.c
>> +++ b/drivers/ide/pci/sl82c105.c
>> @@ -261,26 +261,24 @@ static int sl82c105_ide_dma_on (ide_driv
>>
>> if (config_for_dma(drive)) {
>> config_for_pio(drive, 4, 0, 0);
>
> Ugh, this forces PIO4 on fallback... and dma_on() doesn't select any modes
> in any other driver but this one. :-/
>From looking at config_for_dma() it seems that it is a bug and it is safe to
remove config_for_pio() call (as your "[PATCH] sl82c105: DMA support fixes" does).
>> - return HWIF(drive)->ide_dma_off_quietly(drive);
>> + drive->hwif->dma_off_quietly(drive);
>> + return 0;
>> }
>> printk(KERN_INFO "%s: DMA enabled\n", drive->name);
>> return __ide_dma_on(drive);
>> }
>>
>> -static int sl82c105_ide_dma_off_quietly (ide_drive_t *drive)
>> +static void sl82c105_ide_dma_off_quietly(ide_drive_t *drive)
>
> Also worth renaming...
done
>> {
>> u8 speed = XFER_PIO_0;
>> - int rc;
>> -
>> +
>> DBG(("sl82c105_ide_dma_off_quietly(drive:%s)\n", drive->name));
>>
>> - rc = __ide_dma_off_quietly(drive);
>> + ide_dma_off_quietly(drive);
>> if (drive->pio_speed)
>
> Should always be non-zero since explicitly initialized.
yes
>> speed = drive->pio_speed - XFER_PIO_0;
>> config_for_pio(drive, speed, 0, 1);
>> drive->current_speed = drive->pio_speed;
>
> dma_off() shouldn't be changing current_speed IMHO.
yep and your "[PATCH] sl82c105: DMA support fixes" fixes it
Bart
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