2.6.21-rc4: mmc fails to work, then oopses

From: Pavel Machek
Date: Thu Mar 22 2007 - 07:38:41 EST


Hi!

(Machine was suspended/resumed before this).

mount /dev/mmc1 /mnt

Buffer I/O error on device mmcblk0p1, logical block 1
BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000024
printing eip:
c04cb2ec
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU: 0
EIP: 0060:[<c04cb2ec>] Not tainted VLI
EFLAGS: 00010097 (2.6.21-rc4 #413)
EIP is at mmc_prep_request+0x2c/0x50
eax: 00000000 ebx: ecad6134 ecx: 00000000 edx: ecad6134
esi: ecad6134 edi: f797369c ebp: c04cb490 esp: ecb89f98
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process mmcqd (pid: 7143, ti=ecb88000 task=c230c570 task.ti=ecb88000)
Stack: f7bd5470 c02450f8 00000003 00000000 00000000 ecad6134 f797369c
f7bd5470
f797369c c04cb547 fffffffc f7fc1d08 c013cfbc ffffffff ffffffff
c013ced0
00000000 00000000 00000000 c0104beb f7fc1d00 00000000 00000000
00000000
Call Trace:
[<c02450f8>] elv_next_request+0x88/0x140
[<c04cb547>] mmc_queue_thread+0xb7/0xe0
[<c013cfbc>] kthread+0xec/0xf0
[<c013ced0>] kthread+0x0/0xf0
[<c0104beb>] kernel_thread_helper+0x7/0x1c
=======================

Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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