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alim15x3: PIO mode setup fixes 

* Return failure in ->speedproc method for unsupported/invalid transfer
  modes passed from user-space (fixes theoretical OOPS in ali_tune_pio()
  and/or setting random PIO timings on host controller + disabling UDMA
  bit + setting unsupported/invalid transfer mode on the device).

* Don't disable UDMA bit when programming PIO modes.

* Add FIXME about DMA timings never being set.

* Bump driver version.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-11 23:54:01 +02:00
parent ffe5415c3d
commit a6fe837ed6
1 changed files with 12 additions and 3 deletions
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15
drivers/ide/pci/alim15x3.c
View File

@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/alim15x3.c Version 0.25 Jun 9 2007
* linux/drivers/ide/pci/alim15x3.c Version 0.26 Jul 14 2007
*
* Copyright (C) 1998-2000 Michel Aubry, Maintainer
* Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
@ -418,6 +418,14 @@ static int ali15x3_tune_chipset(ide_drive_t *drive, const u8 speed)
u8 tmpbyte = 0x00;
int m5229_udma = (hwif->channel) ? 0x57 : 0x56;
if (speed < XFER_PIO_0)
return 1;
if (speed >= XFER_PIO_0 && speed <= XFER_PIO_5) {
ali_tune_pio(drive, speed - XFER_PIO_0);
return ide_config_drive_speed(drive, speed);
}
if (speed == XFER_UDMA_6)
speed1 = 0x47;
@ -430,8 +438,9 @@ static int ali15x3_tune_chipset(ide_drive_t *drive, const u8 speed)
tmpbyte &= ultra_enable;
pci_write_config_byte(dev, m5229_udma, tmpbyte);
if (speed < XFER_SW_DMA_0)
ali_tune_pio(drive, speed - XFER_PIO_0);
/*
* FIXME: Oh, my... DMA timings are never set.
*/
} else {
pci_read_config_byte(dev, m5229_udma, &tmpbyte);
tmpbyte &= (0x0f << ((1-unit) << 2));