diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-08-18 15:04:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-17 09:22:03 -0700 |
| commit | d0fe2a761f3c17fc0aabb6a8b11e79905871c7dc (patch) | |
| tree | 6b61b6f5af9da458374c215c76cf15533c0a19d2 /arch | |
| parent | 0d476962400af05b20b19524af561cca613e04d1 (diff) | |
MIPS: Malta: Improve system memory detection for '{e, }memsize' >= 2G
commit 64615682658373516863b5b5971ff1d922d0ae7b upstream.
Using kstrtol to parse the "{e,}memsize" variables was wrong because this
parses signed long numbers. In case of '{e,}memsize' >= 2G, the top bit
is set, resulting to -ERANGE errors and possibly random system memory
boundaries. We fix this by replacing "kstrtol" with "kstrtoul".
We also improve the code to check the kstrtoul return value and
print a warning if an error was returned.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7543/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/mti-malta/malta-memory.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c index 6d9773096750..fdffc806664f 100644 --- a/arch/mips/mti-malta/malta-memory.c +++ b/arch/mips/mti-malta/malta-memory.c @@ -34,13 +34,19 @@ fw_memblock_t * __init fw_getmdesc(int eva) /* otherwise look in the environment */ memsize_str = fw_getenv("memsize"); - if (memsize_str) - tmp = kstrtol(memsize_str, 0, &memsize); + if (memsize_str) { + tmp = kstrtoul(memsize_str, 0, &memsize); + if (tmp) + pr_warn("Failed to read the 'memsize' env variable.\n"); + } if (eva) { /* Look for ememsize for EVA */ ememsize_str = fw_getenv("ememsize"); - if (ememsize_str) - tmp = kstrtol(ememsize_str, 0, &ememsize); + if (ememsize_str) { + tmp = kstrtoul(ememsize_str, 0, &ememsize); + if (tmp) + pr_warn("Failed to read the 'ememsize' env variable.\n"); + } } if (!memsize && !ememsize) { pr_warn("memsize not set in YAMON, set to default (32Mb)\n"); |