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Date: Sat, 09 Sep 2006 17:37:01 +0200 From: Michael De Backer <micdb@...net.be> To: linux-kernel@...r.kernel.org Cc: trivial@...nel.org, akpm@...l.org Subject: [PATCH] alim15x3.c: M5229 (rev c8) support for DMA cd-writer From: Michael De Backer <micdb@...net.be> Configuration bits are not set properly for DMA on some chipset revisions. It has already been corrected for M5229 (rev c7) but not for M5229 (rev c8). This leads to the bug described at http://bugzilla.kernel.org/show_bug.cgi?id=5786 (lost interrupt + ide bus hangs). Signed-off-by: Michael De Backer <micdb@...net.be> --- This has been tested on ASUS A8R32-MVP motherboard (M5229 c8) with 2.6.18-rc6, 2.6.18-rc6-mm1, 2.6.18-rc5-mm1, 2.6.17.10 and two different cd-writers. It completely solves the problem. The following patch is against the 2.6.18-rc6 or 2.6.18-rc6-mm1 kernel: --- linux/drivers/ide/pci/alim15x3.c.orig 2006-09-09 16:07:07.000000000 +0200 +++ linux/drivers/ide/pci/alim15x3.c 2006-09-09 16:08:25.000000000 +0200 @@ -730,7 +730,7 @@ static unsigned int __devinit ata66_ali1 if(m5229_revision <= 0x20) tmpbyte = (tmpbyte & (~0x02)) | 0x01; - else if (m5229_revision == 0xc7) + else if (m5229_revision == 0xc7 || 0xc8) tmpbyte |= 0x03; else tmpbyte |= 0x01; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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