From 324b0c9efc772aa94669a7042a17bda3a09eceec Mon Sep 17 00:00:00 2001 From: Ganesh Goudar Date: Wed, 4 Sep 2019 13:29:49 +0530 Subject: [PATCH] powerpc: dump kernel log before carrying out fadump or kdump [ Upstream commit e7ca44ed3ba77fc26cf32650bb71584896662474 ] Since commit 4388c9b3a6ee ("powerpc: Do not send system reset request through the oops path"), pstore dmesg file is not updated when dump is triggered from HMC. This commit modified system reset (sreset) handler to invoke fadump or kdump (if configured), without pushing dmesg to pstore. This leaves pstore to have old dmesg data which won't be much of a help if kdump fails to capture the dump. This patch fixes that by calling kmsg_dump() before heading to fadump ot kdump. Fixes: 4388c9b3a6ee ("powerpc: Do not send system reset request through the oops path") Reviewed-by: Mahesh Salgaonkar Reviewed-by: Nicholas Piggin Signed-off-by: Ganesh Goudar Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190904075949.15607-1-ganeshgr@linux.ibm.com Signed-off-by: Sasha Levin --- arch/powerpc/kernel/traps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 02fe6d0..d5f351f 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -399,6 +399,7 @@ void system_reset_exception(struct pt_regs *regs) if (debugger(regs)) goto out; + kmsg_dump(KMSG_DUMP_OOPS); /* * A system reset is a request to dump, so we always send * it through the crashdump code (if fadump or kdump are -- 2.7.4