5.15-stable review patch. If anyone has any objections, please let me know.
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From: Sourabh Jain sourabhjain@linux.ibm.com
[ 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: 8255da95e545 ("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 --- arch/powerpc/kernel/fadump.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index ad1c4575c61ce..d496dc5151aa1 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -642,6 +642,7 @@ int __init fadump_reserve_mem(void) return ret; error_out: fw_dump.fadump_enabled = 0; + fw_dump.reserve_dump_area_size = 0; return 0; }