Hello Andrzej Pietrasiewicz,
This is a semi-automatic email about new static checker warnings.
The patch f3a3406b3f56: "usb: gadget: f_uac1: convert to new function
interface with backward compatibility" from Jul 22, 2014, leads to
the following Smatch complaint:
drivers/usb/gadget/function/u_uac1.c:216 gaudio_open_snd_dev()
warn: variable dereferenced before check 'card' (see line 211)
drivers/usb/gadget/function/u_uac1.c
210
211 opts = container_of(card->func.fi, struct f_uac1_opts,
func_inst);
^^^^^^^^^^^^^
New dereference.
212 fn_play = opts->fn_play;
^^^^^^^^^^^^^
Technically, I think the container_of() just does pointer math and the
actual dereference is here. I'm not sure, either way it's dereferenced.
213 fn_cap = opts->fn_cap;
214 fn_cntl = opts->fn_cntl;
215
216 if (!card)
^^^^^
Existing code assumes card can be NULL.
217 return -ENODEV;
218
regards,
dan carpenter
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