Hi Roel,
On Sun, 14 Feb 2010, Roel Kluin wrote:
> Don't dereference autodep when it's NULL. In _autodep_lookup() an
> ERR_PTR(-ENOENT) is assigned to autodep->pwrdm.ptr if pwrdm_lookup() fails.
>
> Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
Thanks for the patch, but I don't understand what problem you're
pointing out. If autodeps is NULL entering clkdm_init(), then the
for-loop won't even be entered.
It looks like there may be a problem, however, in _clkdm_add_autodeps()
and _clkdm_del_autodeps() if no autodeps were passed in. What do you
think about something like the following instead?
- Paul
From: Paul Walmsley <paul@xxxxxxxxx>
Date: Mon, 22 Feb 2010 14:01:45 -0700
Subject: [PATCH] OMAP clockdomain: if no autodeps exist, don't try to add or remove them
_clkdm_add_autodeps() and _clkdm_del_autodeps() will attempt to dereference
a NULL pointer if no autodeps were supplied to clkdm_init().
Based on a patch from Roel Kluin <roel.kluin@xxxxxxxxx> - thanks Roel.
Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
Cc: Roel Kluin <roel.kluin@xxxxxxxxx>
---
arch/arm/mach-omap2/clockdomain.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index de4278c..b26d30a 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -173,6 +173,9 @@ static void _clkdm_add_autodeps(struct clockdomain *clkdm)
{
struct clkdm_autodep *autodep;
+ if (!autodeps)
+ return;
+
for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
if (IS_ERR(autodep->clkdm.ptr))
continue;
@@ -201,6 +204,9 @@ static void _clkdm_del_autodeps(struct clockdomain *clkdm)
{
struct clkdm_autodep *autodep;
+ if (!autodeps)
+ return;
+
for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
if (IS_ERR(autodep->clkdm.ptr))
continue;
--
1.6.6.GIT
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