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MIPS: Do not request resources for crashkernel if one isn't defined

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When KEXEC is enabled but crashkernel details are not passed through the
kernel commandline unnecessary resources are requested (start==end==0)

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14607/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Marcin Nowakowski 2016-11-23 14:43:43 +01:00 committed by Ralf Baechle
parent 39a3cb27c1
commit 269aa43aad
1 changed files with 3 additions and 0 deletions
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3
arch/mips/kernel/setup.c
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@ -672,6 +672,9 @@ static void __init request_crashkernel(struct resource *res)
{ {
int ret; int ret;
if (crashk_res.start == crashk_res.end)
return;
ret = request_resource(res, &crashk_res); ret = request_resource(res, &crashk_res);
if (!ret) if (!ret)
pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",