4.9-stable review patch. If anyone has any objections, please let me know.
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From: Cai Li cai.li@spreadtrum.com
[ Upstream commit 975b820b6836b6b6c42fb84cd2e772e2b41bca67 ]
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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/trace/events/clk.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- 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))