dpll: fix broken error path in dpll_pin_alloc(..)

If pin type is not expected, or pin properities failed to allocate
memory, the unwind error path shall not destroy pin's xarrays, which
were not yet initialized.
Add new goto label and use it to fix broken error path.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/dpll/dpll_core.c b/drivers/dpll/dpll_core.c
index 1eca8cc271f841e7b15967b2c33394169065b4ab..c08772ee9fd6970b4b46477d3974c9fb68d49202 100644 (file)
--- a/drivers/dpll/dpll_core.c
+++ b/drivers/dpll/dpll_core.c
@@ -441,7 +441,7 @@ dpll_pin_alloc(u64 clock_id, u32 pin_idx, struct module *module,
        if (WARN_ON(prop->type < DPLL_PIN_TYPE_MUX ||
                    prop->type > DPLL_PIN_TYPE_MAX)) {
                ret = -EINVAL;
-               goto err;
+               goto err_pin_prop;
        }
        pin->prop = prop;
        refcount_set(&pin->refcount, 1);
@@ -450,11 +450,12 @@ dpll_pin_alloc(u64 clock_id, u32 pin_idx, struct module *module,
        ret = xa_alloc_cyclic(&dpll_pin_xa, &pin->id, pin, xa_limit_32b,
                              &dpll_pin_xa_id, GFP_KERNEL);
        if (ret)
-               goto err;
+               goto err_xa_alloc;
        return pin;
-err:
+err_xa_alloc:
        xa_destroy(&pin->dpll_refs);
        xa_destroy(&pin->parent_refs);
+err_pin_prop:
        kfree(pin);
        return ERR_PTR(ret);
 }