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MIPS: kexec: Do not reserve invalid crashkernel memory on boot 

Do not reserve memory for the crashkernel if the commandline argument
points to a wrong location. This can happen if the location is specified
wrong or if the same commandline is reused when starting the crashkernel
- in the latter case the reserved memory would point to the location
from which the crashkernel is executing.

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14612/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Marcin Nowakowski 2016-11-23 14:43:50 +01:00 committed by Ralf Baechle
parent 73fbc1eba7
commit a8f108d70c
1 changed files with 5 additions and 0 deletions
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5
arch/mips/kernel/setup.c
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@ -741,6 +741,11 @@ static void __init mips_parse_crashkernel(void)
if (ret != 0 || crash_size <= 0)
return;
if (!memory_region_available(crash_base, crash_size)) {
pr_warn("Invalid memory region reserved for crash kernel\n");
return;
}
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}