From: Marc Zyngier maz@kernel.org
commit 018d4671b9bbd4a5c55cf6eab3e1dbc70a50b66e upstream.
On failing to prepare or enable a clock, remove the core structure from the list it has been inserted as it is about to be freed.
This otherwise leads to random crashes when subsequent clocks get registered, during which parsing of the clock tree becomes adventurous.
Observed with QEMU's RPi-3 emulation.
Fixes: 12ead77432f2 ("clk: Don't try to enable critical clocks if prepare failed") Signed-off-by: Marc Zyngier maz@kernel.org Cc: Guenter Roeck linux@roeck-us.net Cc: Stephen Boyd sboyd@kernel.org Cc: Michael Turquette mturquette@baylibre.com Link: https://lkml.kernel.org/r/20200505140953.409430-1-maz@kernel.org Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/clk/clk.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 71621a1..a102eb1 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -3105,6 +3105,9 @@ static int __clk_core_init(struct clk_core *core) out: clk_pm_runtime_put(core); unlock: + if (ret) + hlist_del_init(&core->child_node); + clk_prepare_unlock();
if (!ret)