On 09/11/2014 11:01 AM, Sebastian Andrzej Siewior wrote:
I "forgot" to update the dtb and the kernel crashed:
|Unable to handle kernel NULL pointer dereference at virtual address 0000002e
|PC is at __clk_get_flags+0x4/0xc
|LR is at ti_dt_clockdomains_setup+0x70/0xe8
because I did not have the clock nodes. of_clk_get() returns an error
pointer which is not checked here.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
drivers/clk/ti/clockdomain.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/clk/ti/clockdomain.c b/drivers/clk/ti/clockdomain.c
index f1e0038d76ac..fdd458600c2c 100644
--- a/drivers/clk/ti/clockdomain.c
+++ b/drivers/clk/ti/clockdomain.c
@@ -36,6 +36,11 @@ static void __init of_ti_clockdomain_setup(struct device_node *node)
for (i = 0; i < num_clks; i++) {
clk = of_clk_get(node, i);
+ if (IS_ERR(clk)) {
+ pr_err("Failed get %s' clock nr %d (%ld)\n",
+ node->full_name, i, PTR_ERR(clk));
Could you add %s: __func__ as well - it kinda helps understand this is
part of clockdomain setup and not some driver cribbing that it did not
get some clock.
+ continue;
+ }
if (__clk_get_flags(clk) & CLK_IS_BASIC) {
pr_warn("can't setup clkdm for basic clk %s\n",
__clk_get_name(clk));
--
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