Iqbal,
Iqbal mentioned the following on 1/7/2008 3:50 AM:
Kevin's unlock flash device patch(commit: a34c2f3) switches the NOR flash into write or programming mode. Due to this, watchdog reset is causing the kernel to freeze.
Basically the u-boot sitting on the NOR flash is not read/executed because it is unlocked.
We can have a workaround by locking the device back on the completion of jffs2 booting or otherwise Kevin can suggest something else.
Here is my 2 cents: Lock/unlock for a NOR flash has effect only for
writing to the flash -> not reading. I think ur real issue is that flash
was in the middle of a write operation to the partition (maybe it was
doing a jffs2 garbage collection or something), when wdt triggered a
reset. Relocking the device only hides your problem by forcing it to be
a read only partition. You should be able to hit the problem yet again
by doing a flash_unlock to the partition and then running ur wdt trigger
case. I guess it'd be a bit hard to reset exactly when jffs2 is in the
middle of a write.. but I guess u'd have already looked at it.
What is the correct solution for this issue? I think maybe hardware
should assert reset line to NOR device on a warm reset.
Regards,
Nishanth Menon
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