Re: clk: samsung: Checking a kmemdup() call in _samsung_clk_register_pll()

[Chanwoo Choi]

Hello,

On 19. 10. 12. ìí 11:17, Markus Elfring wrote:
> Hello,
> 
> I tried another script for the semantic patch language out.
> This source code analysis approach points out that the implementation
> of the function â_samsung_clk_register_pllâ contains also a call
> of the function âkmemdupâ.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/samsung/clk-pll.c?id=1c0cc5f1ae5ee5a6913704c0d75a6e99604ee30a#n1275
> https://protect2.fireeye.com/url?k=7e77b0ebee9a0c3e.7e763ba4-43f341fdfe1d32b1&u=https://elixir.bootlin.com/linux/v5.4-rc2/source/drivers/clk/samsung/clk-pll.c#L1275
> 
> * Do you find the usage of the format string â%s: could not allocate
>   rate table for %s\nâ still appropriate at this place?
> 
> * Is there a need to adjust the error handling here?

drivers/clk/samsung/clk-pll.c considers the case of 'pll->rate_table is NULL'
So, maybe just show the warning message if failed to allocate memory
of 'pll->rate_table'. Bu, IMHO, the error handling is necessary
in order to support what 'pll_clk->rate_table' isn't NULL.

> 
> Regards,
> Markus
> 
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics