diff options
| author | Bartlomiej Zolnierkiewicz | 2008-07-23 19:55:56 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz | 2008-07-23 19:55:56 +0200 |
| commit | 3b2a5c7149ee4af4aff8fee953f66fc846d92cea (patch) | |
| tree | bac123edeab61a491625fe42fca8e37e699bf84b /drivers/ide/pci/pdc202xx_old.c | |
| parent | c30daac190de23779090c645e680c7977377032c (diff) | |
ide: filter out "default" transfer mode values in set_xfer_rate()
* Filter out "default" transfer mode values (0x00 - default PIO mode,
0x01 - default PIO mode w/ IORDY disabled) in write handler for obsoleted
/proc/ide/hd?/settings:current_speed setting.
Allowing "default" transfer mode values is a dangerous thing to do as
we don't support programming controller to the "default" transfer mode
and devices often use different values for the default and maximum PIO
mode (i.e. PIO2 default and PIO4 maximum) so the controller will stay
programmed for higher PIO mode while device will use the lower PIO mode.
There is no functionality loss as by using special IOCTLs device can
still be programmed to "default" transfer modes (it is only useful for
debugging/testing purposes anyway).
* Remove no longer needed IDE_HFLAG_ABUSE_SET_DMA_MODE host flag, it was
previously used by few host drivers to program the controller to PIO0
timings for "default" transfer mode == 0x01 (although some host drivers
would program invalid PIO timings instead).
* Cleanup ide_set_xfer_rate() and add BUG_ON().
Suggested-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci/pdc202xx_old.c')
| -rw-r--r-- | drivers/ide/pci/pdc202xx_old.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/ide/pci/pdc202xx_old.c b/drivers/ide/pci/pdc202xx_old.c index 1c2f9df31129..e54dc653b8c4 100644 --- a/drivers/ide/pci/pdc202xx_old.c +++ b/drivers/ide/pci/pdc202xx_old.c @@ -312,7 +312,6 @@ static void __devinit pdc202ata4_fixup_irq(struct pci_dev *dev, #define IDE_HFLAGS_PDC202XX \ (IDE_HFLAG_ERROR_STOPS_FIFO | \ - IDE_HFLAG_ABUSE_SET_DMA_MODE | \ IDE_HFLAG_OFF_BOARD) static const struct ide_port_ops pdc20246_port_ops = { |