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[25/25] powerpc/prom: Stop scanning dev-tree for fdump early

Message ID 1398326431-24305-26-git-send-email-gwshan@linux.vnet.ibm.com (mailing list archive)
State Accepted
Commit a7d0431774cf4b9970cf49da5b5cdd2f1aa71b25
Delegated to: Benjamin Herrenschmidt
Headers show

Commit Message

Gavin Shan April 24, 2014, 8 a.m. UTC 
Function early_init_dt_scan_fw_dump() is called to scan the device
tree for fdump properties under node "rtas". Any one of them is
invalid, we can stop scanning the device tree early by returning
"1". It would save a bit time during boot.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/fadump.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 2230fd0..0266774 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -69,7 +69,7 @@  int __init early_init_dt_scan_fw_dump(unsigned long node,
 	 */
 	token = of_get_flat_dt_prop(node, "ibm,configure-kernel-dump", NULL);
 	if (!token)
-		return 0;
+		return 1;
 
 	fw_dump.fadump_supported = 1;
 	fw_dump.ibm_configure_kernel_dump = *token;
@@ -92,7 +92,7 @@  int __init early_init_dt_scan_fw_dump(unsigned long node,
 					&size);
 
 	if (!sections)
-		return 0;
+		return 1;
 
 	num_sections = size / (3 * sizeof(u32));
 
@@ -110,6 +110,7 @@  int __init early_init_dt_scan_fw_dump(unsigned long node,
 			break;
 		}
 	}
+
 	return 1;
 }