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powerpc/fadump: reset dump area size if fadump memory reserve fails

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[ Upstream commit d1eb75e0dfed80d2d85b664e28a39f65b290ab55 ]

In case fadump_reserve_mem() fails to reserve memory, the
reserve_dump_area_size variable will retain the reserve area size. This
will lead to /sys/kernel/fadump/mem_reserved node displaying an incorrect
memory reserved by fadump.

To fix this problem, reserve dump area size variable is set to 0 if fadump
failed to reserve memory.

Fixes: 8255da95e5 ("powerpc/fadump: release all the memory above boot memory size")
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Acked-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230704050715.203581-1-sourabhjain@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sourabh Jain 2023-07-04 10:37:15 +05:30 committed by Greg Kroah-Hartman
parent 7159a27b1a
commit 81d1de3b97
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kernel/fadump.c
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@ -629,6 +629,7 @@ int __init fadump_reserve_mem(void)
return ret;
error_out:
fw_dump.fadump_enabled = 0;
fw_dump.reserve_dump_area_size = 0;
return 0;
}