[Bug 607906] [NEW] 2.6.35-devel is unable to mount root on mmc

[Till Harbaum]

Public bug reported:

The kernel built from the scripts at
https://code.launchpad.net/~beagleboard-kernel/+junk/2.6.35-devel

fails to mount the root directory from the mmc its booting off, although
it's detecting the mmc just fine and the ext3 support is enabled in the
kernel. This is happening on a  revB7 board.

    1.972015] Waiting for root device /dev/mmcblk0p2...
[    2.192993] usb 2-1: new low speed USB device using musb_hdrc and address 2
[    2.333587] mmc0: new high speed SDHC card at address 0007
[    2.339630] mmcblk0: mmc0:0007 SD04G 3.73 GiB (ro)
[    2.344787]  mmcblk0: p1 p2 p3
[    2.355194] usb 2-1: device v046d pc00e is not supported
[    2.412048] VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
[    2.419128] Please append a correct "root=" boot option; here are the available partitions:
[    2.427612] 1f00             512 mtdblock0 (driver?)
[    2.432617] 1f01            1920 mtdblock1 (driver?)
[    2.437683] 1f02             128 mtdblock2 (driver?)
[    2.442687] 1f03            4096 mtdblock3 (driver?)
[    2.447753] 1f04          255488 mtdblock4 (driver?)
[    2.452819] b300         3911680 mmcblk0 driver: mmcblk
[    2.458068]   b301           40131 mmcblk0p1
[    2.462432]   b302         3365617 mmcblk0p2
[    2.466796]   b303          498015 mmcblk0p3
[    2.471099] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
[    2.479675] [<c004a5d0>] (unwind_backtrace+0x0/0xf8) from [<c0550618>] (panic+0x6c/0xf0)
[    2.487854] [<c0550618>] (panic+0x6c/0xf0) from [<c0009194>] (mount_block_root+0x188/0x230)
[    2.496307] [<c0009194>] (mount_block_root+0x188/0x230) from [<c0009484>] (prepare_namespace+0x140/0x1d4)
[    2.506011] [<c0009484>] (prepare_namespace+0x140/0x1d4) from [<c00086a0>] (kernel_init+0x13c/0x164)
[    2.515258] [<c00086a0>] (kernel_init+0x13c/0x164) from [<c0045518>] (kernel_thread_exit+0x0/0x8)

The very same setup with a kernel built from 
https://code.launchpad.net/~beagleboard-kernel/+junk/2.6-stable
works just fine.

** Affects: linux-ti-omap (Ubuntu)
     Importance: Undecided
         Status: New

-- 
2.6.35-devel is unable to mount root on mmc
https://bugs.launchpad.net/bugs/607906
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