Fix handling of the PIO modes for the pre-EIDE drives that did not support
the PIO Flow Control Transfer Mode value (00001 nnn) of the Set Transfer Mode
feature by skipping the actual mode programming.
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
The patch is against the Linus' tree...
drivers/ide/ide-iops.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
Index: linux-2.6/drivers/ide/ide-iops.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-iops.c
+++ linux-2.6/drivers/ide/ide-iops.c
@@ -756,7 +756,7 @@ int ide_driveid_update(ide_drive_t *driv
int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
{
ide_hwif_t *hwif = drive->hwif;
- int error;
+ int error = 0;
u8 stat;
// while (HWGROUP(drive)->busy)
@@ -767,6 +767,10 @@ int ide_config_drive_speed(ide_drive_t *
hwif->dma_host_off(drive);
#endif
+ /* Skip setting PIO flow-control modes on pre-EIDE drives */
+ if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
+ goto skip;
+
/*
* Don't use ide_wait_cmd here - it will
* attempt to set_geometry and recalibrate,
@@ -814,6 +818,7 @@ int ide_config_drive_speed(ide_drive_t *
drive->id->dma_mword &= ~0x0F00;
drive->id->dma_1word &= ~0x0F00;
+ skip:
#ifdef CONFIG_BLK_DEV_IDEDMA
if (speed >= XFER_SW_DMA_0)
hwif->dma_host_on(drive);
-
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