Hi, I have a defective device, ARAID 99 2000 (RAID0 mode). I want to use this RAID system connected with the Sil3112A PCI card. However, this RAID system does not work on DMA mode. So I modified the kernel code (sata_sil.c) to use the PIO mode as follows. However, the kernel reports `kernel NULL pointer dereference at virtual address 0000002c' in the dmesg. The screen shot is here: http://www.a.phys.nagoya-u.ac.jp/~cyamauch/p1030021.jpg Doesn't Sil3112A support PIO mode? *** /usr/src/linux-2.4.31/drivers/scsi/sata_sil.c._orig_ Wed Jun 1 09:56:34 2005 --- /usr/src/linux-2.4.31/drivers/scsi/sata_sil.c Wed Feb 22 08:49:03 2006 *************** *** 67,72 **** --- 67,73 ---- SIL_INTR_STEERING = (1 << 1), SIL_QUIRK_MOD15WRITE = (1 << 0), SIL_QUIRK_UDMA5MAX = (1 << 1), + SIL_QUIRK_ARAID = (1 << 2), }; static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); *************** *** 106,111 **** --- 107,113 ---- { "ST380011ASL", SIL_QUIRK_MOD15WRITE }, { "ST3120022ASL", SIL_QUIRK_MOD15WRITE }, { "ST3160021ASL", SIL_QUIRK_MOD15WRITE }, + { "ASI ARAID99 2000", SIL_QUIRK_ARAID }, { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX }, { } }; *************** *** 345,350 **** --- 347,360 ---- ap->udma_mask &= ATA_UDMA5; return; } + + if (quirks & SIL_QUIRK_ARAID) { + printk(KERN_INFO "ata%u(%u): applying ASI ARAID99 errata fix %s\n", + ap->id, dev->devno, s); + ap->udma_mask = 0; + ap->mwdma_mask = 0; + return; + } } static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) == Chisato Yamauchi ================================= - : send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
