Hi Guy, On 01/20/2014 01:24 PM, Guy Martin wrote: > I tried to switch to the ATA drivers but I keep getting a panic > whenever I load the pata_sil680 module on my C8000 > > Kconfig : http://bpaste.net/show/170067/ > Kver : 3.12.8-gentoo > > This is the backtrace : > insmoterminator ~ # insmod pata_sil680.ko > pata_sil680 0000:60:02.0: version 0.4.9 > pata_sil680 0000:60:02.0: sil680: BA5_EN = 1 clock = 00 > pata_sil680 0000:60:02.0: sil680: BA5_EN = 1 clock = 10 > sil680: 133MHz clock. > Backtrace: > [<00000000401ad0c4>] handle_percpu_irq+0xbc/0xf8 > [<00000000401a62c4>] generic_handle_irq+0x4c/0x68 > [<00000000401062a4>] syscall_do_resched+0x28/0x34 > [<000000004011e1f8>] execute_on_irq_stack+0x70/0xb8 .... > > If I hack the driver to enable MMIO, I have the following backtrace : > scsi2 : pata_sil680 > scsi3 : pata_sil680 > ata1: PATA max UDMA/133 irq 71 > ata2: PATA max UDMA/133 irq 71 > scsi 3:0:0:0: CD-ROM HL-DT-ST DVDRAM GSA-4082B A208 PQ: 0 ANSI: 5 > ata2.00: configured for UDMA/66 > sr0: scsi3-mmc drive: 32x/32x writer dvd-ram cd/rw xa/form2 cdda tray > cdrom: Uniform CD-ROM driver Revision: 3.20 > sr 3:0:0:0: Attached scsi CD-ROM sr0 > sr 3:0:0:0: Attached scsi generic sg1 type 5 > [<00000000401ad0c4>] handle_percpu_irq+0xbc/0xf8 > [<00000000401a62c4>] generic_handle_irq+0x4c/0x68 > [<00000000401062a4>] syscall_do_resched+0x28/0x34 > > > With MMIO, it goes a little bit further as it detects the drive correctly but eventually fails the same way. > > As far as I understand the backtrace, it would seem that an IRQ > handler function pointer is set to NULL or some NULL pointer deref > occurs in the IRQ handler. Also, this is not the original DVD drive > from the C8000. I replaced it with a DVD burner.> > How idea what can be the issue ? I'm just guessing here since I would need to test myself. But James Bottomley found once, that the secondary port of the cmd64x controller was not completely wired physically up on parisc. He posted a patch series here: http://www.spinics.net/lists/linux-ide/msg40816.html Maybe there is some similarity for pata_sil680 too, esp. since it seems from the log above that you connected your DVD drive to the secondary port (scsi3). What happens if you connect it to scsi2/the first pata port instead? Helge -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
