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sh: Do not try merging two 128MB PMB mappings 

There is a logic error in pmb_merge() that means we will incorrectly try
to merge two 128MB PMB mappings into one mapping. However, 256MB isn't a
valid PMB map size and pmb_merge() will actually drop the second 128MB
mapping.

This patch allows my SDK7786 board to boot when configured with
CONFIG_MEMORY_SIZE=0x10000000.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
hifive-unleashed-5.1
Matt Fleming 2010-04-25 17:29:07 +01:00
parent 9c3d936352
commit c7b03fa0bd
1 changed files with 1 additions and 1 deletions
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2
arch/sh/mm/pmb.c
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@ -681,7 +681,7 @@ static void __init pmb_merge(struct pmb_entry *head)
/*
* The merged page size must be valid.
*/
if (!pmb_size_valid(newsize))
if (!depth || !pmb_size_valid(newsize))
return;
head->flags &= ~PMB_SZ_MASK;