On Fri, 15 Dec 2006 15:45:55 +0059 Jiri Slaby <jirislaby@xxxxxxxxx> wrote: > Andrew Morton wrote: > > Temporarily at > > > > http://userweb.kernel.org/~akpm/2.6.20-rc1-mm1/ > > > > Will appear later at > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc1/2.6.20-rc1-mm1/ > > The kernel panics at boot in pdc_port_start+0x82 with deref of 0x14: > http://www.fi.muni.cz/~xslaby/sklad/pdc_oops.png > > ATA port is not connected, only 2 SATA disks on my > # lspci -vvxs 02:01.0 > 02:01.0 Mass storage controller: Promise Technology, Inc. PDC40775 (SATA 300 > TX2plus) (rev 02) > Subsystem: Promise Technology, Inc. PDC40775 (SATA 300 TX2plus) > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- > Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- > <TAbort- <MAbort- >SERR- <PERR- > Latency: 72 (1000ns min, 4500ns max), Cache Line Size: 4 bytes > Interrupt: pin A routed to IRQ 19 > Region 0: I/O ports at 8000 [size=128] > Region 2: I/O ports at 8400 [size=256] > Region 3: Memory at fb025000 (32-bit, non-prefetchable) [size=4K] > Region 4: Memory at fb000000 (32-bit, non-prefetchable) [size=128K] > [virtual] Expansion ROM at 50000000 [disabled] [size=32K] > Capabilities: [60] Power Management version 2 > Flags: PMEClk- DSI+ D1+ D2- AuxCurrent=0mA > PME(D0-,D1-,D2-,D3hot-,D3cold-) > Status: D0 PME-Enable- DSel=0 DScale=0 PME- > 00: 5a 10 73 3d 07 00 30 02 02 00 80 01 01 48 00 00 > 10: 01 80 00 00 00 00 00 00 01 84 00 00 00 50 02 fb > 20: 00 00 00 fb 00 00 00 00 00 00 00 00 5a 10 73 3d > 30: 00 00 00 00 60 00 00 00 00 00 00 00 0a 01 04 12 > Presumably void __iomem *mmio = (void __iomem *) ap->ioaddr.scr_addr; gave us a null pointer. Something like this: diff -puN drivers/ata/sata_promise.c~a drivers/ata/sata_promise.c --- a/drivers/ata/sata_promise.c~a +++ a/drivers/ata/sata_promise.c @@ -294,6 +294,10 @@ static int pdc_port_start(struct ata_por void __iomem *mmio = (void __iomem *) ap->ioaddr.scr_addr; unsigned int tmp; + if (!mmio) { + rc = -EDOM; + goto out_kfree; + } tmp = readl(mmio + 0x014); tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */ writel(tmp, mmio + 0x014); _ should perhaps let you wobble to a state where you can get us the full dmesg output, please. Actually, that should already be possible simply using netconsole. - To unsubscribe from this list: 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
