tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-4.20 head: 7f91e2af1a4a2c34fc2e8fb046c722e1a9c85399 commit: 8307b2afd386ccce369821daa2196068c47fe8cd [519/526] ASoC: stm32: sai: set sai as mclk clock provider

smatch warnings: sound/soc/stm/stm32_sai_sub.c:343 stm32_sai_mclk_set_rate() warn: unsigned 'div' is never less than zero.

vim +/div +343 sound/soc/stm/stm32_sai_sub.c

333 334 static int stm32_sai_mclk_set_rate(struct clk_hw *hw, unsigned long rate, 335 unsigned long parent_rate) 336 { 337 struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); 338 struct stm32_sai_sub_data *sai = mclk->sai_data; 339 unsigned int div; 340 int ret; 341 342 div = stm32_sai_get_clk_div(sai, parent_rate, rate);

343 if (div < 0)

344 return div; 345 346 ret = stm32_sai_set_clk_div(sai, div); 347 if (ret) 348 return ret; 349 350 mclk->freq = rate; 351 352 return 0; 353 } 354

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