From: Pranith Kumar Date: Thu, 22 Jan 2015 02:26:09 +0000 (-0500) Subject: powerpc/powernv: Skip registering log region when CONFIG_PRINTK=n X-Git-Tag: firefly_0821_release~176^2~2353^2~24 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6501ab5e380cf25dad85705856bfdde439dbcbd2;p=firefly-linux-kernel-4.4.55.git 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 --- 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