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clk: fix a panic error caused by accessing NULL pointer
[ Upstream commit975b820b68
] 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:dfc202ead3
(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@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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commit
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1 changed files with 2 additions and 2 deletions
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@ -134,12 +134,12 @@ DECLARE_EVENT_CLASS(clk_parent,
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TP_STRUCT__entry(
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__string( name, core->name )
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__string( pname, parent->name )
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__string( pname, parent ? parent->name : "none" )
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),
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TP_fast_assign(
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__assign_str(name, core->name);
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__assign_str(pname, parent->name);
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__assign_str(pname, parent ? parent->name : "none");
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),
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TP_printk("%s %s", __get_str(name), __get_str(pname))
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