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| author | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-27 10:51:32 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-10 16:41:49 +0300 |
| commit | f7f8aea4b97c4d48e42f02cb37026bee445f239f (patch) | |
| tree | d88a133fc167d19d009df239922146fb05120a69 /arch/mips | |
| parent | 9eaffa84a8a46adab065c983401fc9d5949c958f (diff) | |
| download | linux-f7f8aea4b97c4d48e42f02cb37026bee445f239f.tar.xz | |
MIPS: Malta: Detect and fix bad memsize values
memsize denotes the amount of RAM we can access from kseg{0,1} and
that should be up to 256M. In case the bootloader reports a value
higher than that (perhaps reporting all the available RAM) it's best
if we fix it ourselves and just warn the user about that. This is
usually a problem with the bootloader and/or its environment.
[ralf@linux-mips.org: Remove useless parens as suggested bei Sergei.
Reformat long pr_warn statement to fit into 80 column limit.]
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: <stable@vger.kernel.org> # v3.15+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9362/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/mti-malta/malta-memory.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c index 8fddd2cdbff7..efe366d618b1 100644 --- a/arch/mips/mti-malta/malta-memory.c +++ b/arch/mips/mti-malta/malta-memory.c @@ -53,6 +53,12 @@ fw_memblock_t * __init fw_getmdesc(int eva) pr_warn("memsize not set in YAMON, set to default (32Mb)\n"); physical_memsize = 0x02000000; } else { + if (memsize > (256 << 20)) { /* memsize should be capped to 256M */ + pr_warn("Unsupported memsize value (0x%lx) detected! " + "Using 0x10000000 (256M) instead\n", + memsize); + memsize = 256 << 20; + } /* If ememsize is set, then set physical_memsize to that */ physical_memsize = ememsize ? : memsize; } |