drivers/media/rc/iguanair.c:276 iguanair_receiver() error: doing dma on the stack ((null))

Hi Sean,

FYI, there are new smatch warnings show up in

tree:   git://git.infradead.org/users/kmpark/linux-samsung commit-list
commit: 26ff63137c45886169ed102bddd6e90d6c27f00d [media] Add support for the IguanaWorks USB IR Transceiver

drivers/media/rc/iguanair.c:211 iguanair_get_features() error: doing dma on the stack ((null)) drivers/media/rc/iguanair.c:230 iguanair_get_features() error: doing dma on the stack ((null)) drivers/media/rc/iguanair.c:249 iguanair_get_features() error: doing dma on the stack ((null))
+ drivers/media/rc/iguanair.c:276 iguanair_receiver() error: doing dma on the stack ((null))

vim +276 drivers/media/rc/iguanair.c
260
261 if (len > 5 && ir->version[0] >= 4)
262 ir->cycle_overhead = response.data[1];
263
264 out:
265 return rc;
266 }
267
268 static int iguanair_receiver(struct iguanair *ir, bool enable)
269 {
270 struct packet packet = { 0, DIR_OUT, enable ?
271 CMD_RECEIVER_ON : CMD_RECEIVER_OFF };
272 int rc;
273
274 INIT_COMPLETION(ir->completion);
275

277 if (rc)
278 return rc;
279
280 wait_for_completion_timeout(&ir->completion, TIMEOUT);
281
282 return 0;
283 }
284

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0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu, Yuanhan Liu Intel Corporation

Hi Fenguang,

Ah, that is wrong indeed. Thanks for letting me know!

I'm working on patch for this for v3.7.

Sean