Date: Tue, 16 Dec 1997 01:42:21 +0200 (SAT) From: Paul Allenby <pallenby@zibbi.mikom.csir.co.za> To: freebsd-current@freebsd.org Subject: wd and DMA Message-ID: <199712152342.BAA09522@zibbi.mikom.csir.co.za>
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Ja boet, hoe ga't 'it da'so :)
A while ago John Hood spotted a bug in his isa DMA code which he fixed
with the following:
--- pci/ide_pci.c Sat Nov 8 02:22:48 1997
+++ /tmp/ide_pci.c Mon Nov 10 23:35:00 1997
@@ -714,7 +714,7 @@
u_long word40;
/* can drive do PIO 4 and MW DMA 2? */
- if (!(mwdma_mode(wp) >= 4 && pio_mode(wp) >= 4))
+ if (!(mwdma_mode(wp) >= 2 && pio_mode(wp) >= 4))
return 0;
word40 = pci_conf_read(cookie->tag, 0x40);
I had this patch in my source tree until I moved /sys to a different
disk and had to re-checkout -current's kernel code.
After booting with a new kernel, DMA was no longer reported by the wd
driver. So, my request is that would someone please commit this change :)
Paul
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