Re: Promise, DMA and RAID5 problems running 2.4.1

[Vojtech Pavlik <vojtech@suse.cz>]

[-- Attachment #1: Type: text/plain, Size: 483 bytes --]

On Wed, Feb 07, 2001 at 12:53:36PM -0800, Andre Hedrick wrote:
> On Wed, 7 Feb 2001, Alan Cox wrote:
> 
> > > Iff CONFIG_BLK_DEV_IDECS is set then yes, doing schedule is better.
> > > But I do not see any benefit in doing
> > > 
> > > unsigned long timeout = jiffies + ((HZ + 19)/20) + 1;
> > > while (0 < (signed long)(timeout - jiffies));
> > 
> > On that bit we agree.
> 
> What do you want fixed?
> Send a patch and lets try it....

How about this?

-- 
Vojtech Pavlik
SuSE Labs

[-- Attachment #2: pdcpatch --]
[-- Type: text/plain, Size: 1228 bytes --]

--- pdc202xx.c.old	Fri Jul 28 21:08:30 2000
+++ pdc202xx.c	Fri Feb  9 09:08:55 2001
@@ -747,14 +747,11 @@
 {
 	unsigned long high_16	= pci_resource_start(HWIF(drive)->pci_dev, 4);
 	byte udma_speed_flag	= inb(high_16 + 0x001f);
-	int i			= 0;
 
 	OUT_BYTE(udma_speed_flag | 0x10, high_16 + 0x001f);
-	ide_delay_50ms();
-	ide_delay_50ms();
+	mdelay(100)
 	OUT_BYTE(udma_speed_flag & ~0x10, high_16 + 0x001f);
-	for (i = 0; i < 40; i++)
-		ide_delay_50ms();
+	mdelay(2000);		/* 2 seconds ?! */
 }
 
 unsigned int __init pci_init_pdc202xx (struct pci_dev *dev, const char *name)
@@ -767,7 +764,6 @@
 	if ((dev->device == PCI_DEVICE_ID_PROMISE_20262) ||
 	    (dev->device == PCI_DEVICE_ID_PROMISE_20265) ||
 	    (dev->device == PCI_DEVICE_ID_PROMISE_20267)) {
-		int i = 0;
 		/*
 		 * software reset -  this is required because the bios
 		 * will set UDMA timing on if the hdd supports it. The
@@ -779,11 +775,9 @@
 		 */
 
 		OUT_BYTE(udma_speed_flag | 0x10, high_16 + 0x001f);
-		ide_delay_50ms();
-		ide_delay_50ms();
+		mdelay(100);
 		OUT_BYTE(udma_speed_flag & ~0x10, high_16 + 0x001f);
-		for (i=0; i<40; i++)
-			ide_delay_50ms();
+		mdelay(2000);	/* 2 seconds ?! */
 	}
 
 	if (dev->resource[PCI_ROM_RESOURCE].start) {