From: Austin Kim <austindh.kim@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alexandre Ghiti <alex@ghiti.fr>
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
austindh.kim@gmail.com
Subject: [PATCH] riscv: kdump: return early for invalid 'crashkernel=0' input
Date: Fri, 6 Feb 2026 13:35:21 +0900 [thread overview]
Message-ID: <aYVvieviDNvoTRNq@adminpc-PowerEdge-R7525> (raw)
From: Austin Kim <austin.kim@lge.com>
An invalid 'crashkernel=0' can be specified when running kdump.
By adding a check for 'crashkernel=0', it can return early when detecting
this invalid input.
Signed-off-by: Austin Kim <austin.kim@lge.com>
---
arch/riscv/mm/init.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 811e03786..e61fec445 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1409,7 +1409,8 @@ static void __init arch_reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base,
&low_size, NULL, &high);
- if (ret)
+ /* invalid value specified or 'crashkernel=0' */
+ if (ret || !crash_size)
return;
reserve_crashkernel_generic(crash_size, crash_base, low_size, high);
--
2.34.1
next reply other threads:[~2026-02-06 4:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-06 4:35 Austin Kim [this message]
2026-02-13 0:47 ` Paul Walmsley
2026-02-13 1:16 ` Austin Kim
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