clk: add pr_debug & kerneldoc around clk notifiers
Both the pr_err and the additional kerneldoc aim to help when debugging
errors thrown from within a clock rate-change notifier callback.
Reported-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index a6f079d..f30e6af 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1339,8 +1339,11 @@
if (clk->notifier_count)
ret = __clk_notify(clk, PRE_RATE_CHANGE, clk->rate, new_rate);
- if (ret & NOTIFY_STOP_MASK)
+ if (ret & NOTIFY_STOP_MASK) {
+ pr_debug("%s: clk notifier callback for clock %s aborted with error %d\n",
+ __func__, clk->name, ret);
goto out;
+ }
hlist_for_each_entry(child, &clk->children, child_node) {
ret = __clk_speculate_rates(child, new_rate);