On Fri, 2 Nov 2007 14:29:17 +0100 (CET)
Krzysztof Oledzki <olel@xxxxxx> wrote:
> Hello,
>
> I just tried to switch from old IDE to libata but unfortunately kernel
> (2.6.22.10) hangs during boot:
>
> ata1: PATA max UDMA/66 cmd 0x000101e8 ctl 0x000103ee bmdma 0x00012c40 irq 11
> ata2: DUMMY
> ata1.00: ATAPI: HL-DT-ST CD-ROM GCR-8482B, 1.00, max MWDMA2
> ara1.01: ATAPI: LITE-ON LTR-62327S, QS75, max UDMA/33
> ata1.00: configured for MWDMA2
> ata1.00: configured for UDMA/33
> scsi 2:0:0:0: CDROM HL-DT-ST CDROM GCR-8482B 1.00 PQ: 0 ANSI 5
> (kernel hangs)
>
> Attaching lspci and dmesg from working system, with pata_serverworks
> disabled.
Try the following patch and let me know if it helps:
--- drivers/ata/pata_serverworks.c~ 2007-11-02 17:25:41.078936752 +0000
+++ drivers/ata/pata_serverworks.c 2007-11-02 17:25:41.078936752 +0000
@@ -274,28 +274,27 @@
{
static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
int offset = 1 + 2 * ap->port_no - adev->devno;
- int devbits = (2 * ap->port_no + adev->devno);
+ int devbits = 2 * ap->port_no + adev->devno;
u8 ultra;
u8 ultra_cfg;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
pci_read_config_byte(pdev, 0x54, &ultra_cfg);
+ pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
+ ultra &= ~(0x0F << (adev->devno * 4));
if (adev->dma_mode >= XFER_UDMA_0) {
pci_write_config_byte(pdev, 0x44 + offset, 0x20);
- pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
- ultra &= ~(0x0F << (ap->port_no * 4));
ultra |= (adev->dma_mode - XFER_UDMA_0)
- << (ap->port_no * 4);
- pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
-
+ << (adev->devno * 4);
ultra_cfg |= (1 << devbits);
} else {
pci_write_config_byte(pdev, 0x44 + offset,
dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
ultra_cfg &= ~(1 << devbits);
}
+ pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
pci_write_config_byte(pdev, 0x54, ultra_cfg);
}
-
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