Date: Wed, 20 Aug 2003 01:39:37 +0200 (CEST) From: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> To: sos@FreeBSD.org Cc: freebsd-hackers@freebsd.org Subject: Bug FreeBSD 4.8 ATA driver Message-ID: <Pine.LNX.4.44.0308200130120.12189-100000@artax.karlin.mff.cuni.cz>
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Hi
I am reading FreeBSD ATA drivers because I want to use them as base for my
ATA driver and I found a total nonsence: in ata-dma.c in FreeBSD 4.8,
there is line
if (!((pci_read_config(parent,0x40,4)>>(ch->unit<<8))&0x4000)) {
if ch->unit is 1, config word is shifted by 256 bytes, which gives
undefined result in C. How was this meant? What should it do?
Mikulas
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