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authorCai Li <cai.li@spreadtrum.com>2017-11-21 12:24:38 +0300
committerStephen Boyd <sboyd@codeaurora.org>2017-12-06 02:28:51 +0300
commit975b820b6836b6b6c42fb84cd2e772e2b41bca67 (patch)
treebe5a439036e60b2b6a66620ba34c2e35d7a223d9 /include/trace/events/clk.h
parent588fb54b0cc5be5fd2e12bb04810534ffc3d49cc (diff)
downloadlinux-975b820b6836b6b6c42fb84cd2e772e2b41bca67.tar.xz
clk: fix a panic error caused by accessing NULL pointer
In some cases the clock parent would be set NULL when doing re-parent, it will cause a NULL pointer accessing if clk_set trace event is enabled. This patch sets the parent as "none" if the input parameter is NULL. Fixes: dfc202ead312 (clk: Add tracepoints for hardware operations) Signed-off-by: Cai Li <cai.li@spreadtrum.com> Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'include/trace/events/clk.h')
-rw-r--r--include/trace/events/clk.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/trace/events/clk.h b/include/trace/events/clk.h
index 758607226bfd..2cd449328aee 100644
--- a/include/trace/events/clk.h
+++ b/include/trace/events/clk.h
@@ -134,12 +134,12 @@ DECLARE_EVENT_CLASS(clk_parent,
TP_STRUCT__entry(
__string( name, core->name )
- __string( pname, parent->name )
+ __string( pname, parent ? parent->name : "none" )
),
TP_fast_assign(
__assign_str(name, core->name);
- __assign_str(pname, parent->name);
+ __assign_str(pname, parent ? parent->name : "none");
),
TP_printk("%s %s", __get_str(name), __get_str(pname))