When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.
Signed-off-by: Pranith Kumar <bobby.pr...@gmail.com>
CC: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/platforms/powernv/opal.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/opal.c
b/arch/powerpc/platforms/powernv/opal.c
index f10b9ec..1db119f0 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -667,7 +667,13 @@ static void __init opal_dump_region_init(void)
/* Register kernel log buffer */
addr = log_buf_addr_get();
+ if (addr == NULL)
+ return;
+
size = log_buf_len_get();
+ if (size == 0)
+ return;
+
rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF,
__pa(addr), size);
/* Don't warn if this is just an older OPAL that doesn't
--
1.9.1
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