From 6501ab5e380cf25dad85705856bfdde439dbcbd2 Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Wed, 21 Jan 2015 21:26:09 -0500 Subject: [PATCH] powerpc/powernv: Skip registering log region when CONFIG_PRINTK=n 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 Reviewed-by: Stewart Smith Signed-off-by: Michael Ellerman --- 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 f10b9ec8c1f5..1db119f0f4ee 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 -- 2.30.2