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SubjectRe: [2.6.17-rc6-mm1] Oops during sata_promise init
Philipp Baumann <pumuckl@i12.com> wrote:
>
> Hi,
>
> testing the latest mm kernel, i still get an Oops as follows:
>
>
> BUG: unable to handle kernel NULL pointer dereference at virtual address
> 00000008
> printing eip:
> c0256773
> *pde = 00000000
> Oops: 0002 xxxx
> 4K_STACKS PREEMPT
> last sysfs file:
> Modules linked in:
> CPU: 0
> EIP: 0060:[<c0256773>] Not tainted VLI
> EFLAGS: 00010202 (2.6.17-rc6-mm1 #1)
> EIP is at pdc_sata_scr_write+0x10/0x14
> eax: 00000008 ebx: dfeb429c ecx: 00000300 edx: 0000002
> esi: dfeb429c edi: 00000300 ebp: 00000002 esp: dffc3e44
> ds: 007b es: 007b ss: 0068
> Process idle (pid: 1, threadinfo=dffc3000 task=dffc2ab0)
> Stack: c02cb980 c024c84b dfeb429c dfeb0c78 fffb82ca dfeb429c c024e4b5
> c0244541
> c02e60a6 c3000000 c01ea753 c0256281 dfeb429c dfeb0c78 00000002 c024e5bc
> dfeb0834 c0250cee dfeac408 e1493800 00000053 c02e6ef3 e0802300 c0802338
> Call Trace:
> [<c024c84b>] sata_scr_write_flush+0x24/0x37
> [<c024e4b5>] __sata_phy_reset+0x2e/0x12d
> [<c0244541>] scsi_add_host+0xc0/0x192
> [<c01ea753>] __delay+0x6/0x7
> [<c0256281>] pdc_reset_port+0x1f/0x34
> [<c024e5bc>] sata_phy_reset+0x8/0x18
> [<c0250cee>] ata_device_add+0x580/0x6b1
> [<c0256c41>] pdc_ata_init_one+0x2a9/0x3c8
> [<c01f5732>] pci_device_probe+0x40/0x5b
> [<c023f70b>] driver_probe_device+0x3b/0xaa
> [<c023f830>] __driver_attach+0x5a/0x5c
> [<c023f1c4>] bus_for_each_dev+0x3a/0x58
> [<c023f67a>] driver_attach+0x16/0x1a
> [<c023f7d6>] --driver_attach+0x0/0x5c
> [<c023ee9c>] bus_add_driver+0x6f/0x11f
> [<c01f5889>] __pci_register_driver+0x34/0x4f
> [<c010028c>] init+0x6c/0x225
> [<c02bd34e>] __kprobes_text_start+0x6/0x14
> [<c0100220>] init+0x0/0x225
> [<c0100220>] init+0x0/0x225
> [<c0101005>] kernel_thread_helper+0x5/0xb
> Code: 02 77 0a 8d 04 12 01 c0 03 41 60 8b 00 c3 8b 80 78 1f 00 00 8b 40
> 08 8b 40 40 c3 53 89 c3 83 fa 02 77 0a 8d
> 04 12 01 c0 03 43 60 <89> 08 5b c3 55 57 56 53 83 ec 10 89 c6 9c 5d fa
> b8 00 f0 ff ff
> EIP: [<c0256773>] pdc_sata_scr_write+0x10/0x14 SS:ESP 0068:dffc3e44

Thanks. ap->ioaddr.scr_addr is zero in pdc_sata_scr_write().
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