From 319f1276f9a392526d2f40ecd76c1c829d0cf5fa Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Thu, 18 Sep 2014 16:33:27 +0200 Subject: [PATCH] clk: ti: consider the fact that of_clk_get() might return an error 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. Acked-by: Nishanth Menon Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Tero Kristo --- 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..b4c5faccaece 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("%s: Failed get %s' clock nr %d (%ld)\n", + __func__, node->full_name, i, PTR_ERR(clk)); + continue; + } if (__clk_get_flags(clk) & CLK_IS_BASIC) { pr_warn("can't setup clkdm for basic clk %s\n", __clk_get_name(clk));