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authorGanesh Goudar <ganeshgr@linux.ibm.com>2019-09-04 13:29:49 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2019-09-18 00:03:51 +1000
commite7ca44ed3ba77fc26cf32650bb71584896662474 (patch)
treee7ba3627c079e272068c76af5582ca2999f9ed9f /arch
parentad9b48c52296ddb7620e3f2b66a7479b78632dff (diff)
downloadlinux-e7ca44ed3ba77fc26cf32650bb71584896662474.tar.bz2
powerpc: dump kernel log before carrying out fadump or kdump
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 <mahesh@linux.vnet.ibm.com> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190904075949.15607-1-ganeshgr@linux.ibm.com
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/traps.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 11caa0291254..82f43535e686 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -472,6 +472,7 @@ 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