Re: [PATCH v2] CLK: TI: consider the fact that of_clk_get() might return an error

[Nishanth Menon <nm@ti.com>]

On 17:56-20140917, 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@linutronix.de>
> ---
> v1…v2:
>     add "%s __func__" to the added pr_err
> 
> * Nishanth Menon | 2014-09-17 07:52:33 [-0500]:
> >
> >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.
> 
> As you wish.
> 
>  drivers/clk/ti/clockdomain.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/clk/ti/clockdomain.c b/drivers/clk/ti/clockdomain.c
> index f1e0038d76ac..446481166ce9 100644
> --- a/drivers/clk/ti/clockdomain.c
> +++ b/drivers/clk/ti/clockdomain.c
> @@ -36,6 +36,12 @@ 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;
> +		}

Once the following is fixed (checkpatch --strict) feel free to add:
Acked-by: Nishanth Menon <nm@ti.com>

#65: FILE: drivers/clk/ti/clockdomain.c:35:
_node *node)

CHECK: Alignment should match open parenthesis
#71: FILE: drivers/clk/ti/clockdomain.c:40:
+			pr_err("%s: Failed get %s' clock nr %d (%ld)\n",
+					__func__, node->full_name, i,

total: 1 errors, 0 warnings, 1 checks, 16 lines checked


If any of these errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.

-- 
Regards,
Nishanth Menon
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