path: root/arch/powerpc/sysdev/cpm_common.c
diff options
authorHongjun Chen <Hong-jun.Chen@freescale.com>2010-03-26 16:43:46 +0800
committerKumar Gala <galak@kernel.crashing.org>2011-10-22 16:15:50 -0500
commit1661e5bd550bf024b04dfa7abf2963d04ab119e3 (patch)
treed7d418fa4fae60ba540244a5b52531dc56ce90dc /arch/powerpc/sysdev/cpm_common.c
parentdrivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager (diff)
powerpc/cpm: Clear muram before it is in use.
We need to ensure that MURAM is in a known and cleared out state before using it as the bootloader could have utilized it from its own purposes and left it in an unknown state. If we don't clear it out we've seen issues with UCC ethernet: * Multi ethernet interfaces can't work simultanously. * Multi up/down Ethernet interfaces will halt these ports. * UCC1 RGMII can't work when kernel boots from some hosts. Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com> Signed-off-by: Hongjun Chen <Hong-jun.Chen@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/cpm_common.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index d55d0ad0deab..8db10bb90042 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -3,7 +3,7 @@
* Author: Scott Wood <scottwood@freescale.com>
- * Copyright 2007 Freescale Semiconductor, Inc.
+ * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
* Some parts derived from commproc.c/cpm2_common.c, which is:
* Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
@@ -146,6 +146,7 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
spin_lock_irqsave(&cpm_muram_lock, flags);
cpm_muram_info.alignment = align;
start = rh_alloc(&cpm_muram_info, size, "commproc");
+ memset(cpm_muram_addr(start), 0, size);
spin_unlock_irqrestore(&cpm_muram_lock, flags);
return start;