[PATCH] adaptec 1210sa

[Mickael Marchand <marchand@kde.org>]

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Hi,

reading linux-scsi I found a suggestion by Justin to make adaptec's 1210 sa 
working. I made the corresponding patch for libata, and it actually works :)

it needs  some redesign to only apply to aar1210 (as standard sil3112 does not 
need it) and I guess some testing before inclusion.

the idea suggested by Justin was to clear bits 6 and 7 at 0x8a of pci 
configuration space. (which I hope did fine :)

Thanks Justin :)

Cheers,
Mik
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--- /usr/src/linux-2.6.0/drivers/scsi/sata_sil.c	2003-12-21 13:30:58.000000000 +0100
+++ linux-2.6.0/drivers/scsi/sata_sil.c	2003-12-22 02:46:32.000000000 +0100
@@ -276,6 +276,16 @@
 		goto err_out_regions;
 	}
 
+	//let's have fun
+	u8 v; 
+	pci_read_config_byte(pdev, 0x8a, &v);
+	int mask = 0x3f; //clear 6 and 7 bits
+	if (v & ~mask) {
+		printk("Reenabling interrupts because Adaptec's BIOS disables them\n" );
+		v &= mask;
+		pci_write_config_byte(pdev, 0x8a, v);
+	}
+
 	memset(probe_ent, 0, sizeof(*probe_ent));
 	INIT_LIST_HEAD(&probe_ent->node);
 	probe_ent->pdev = pdev;