Unverified Commit d29416f9 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
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!14623 staging: iio: frequency: ad9832: fix division by zero in ad9832_calc_freqreg() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Guo Mengqi <guomengqi3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/24DGDXRNFPXV6XAU7EAPYU6DZ5KHVVTO/ 
 
https://gitee.com/src-openeuler/kernel/issues/IB67SG 
 
Link:https://gitee.com/openeuler/kernel/pulls/14623

 

Reviewed-by: default avatarLi Nan <linan122@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parents f032f68e 5a1977fc

drivers/staging/iio/frequency/ad9832.c

+5 −2
Original line number Diff line number Diff line
@@ -129,12 +129,15 @@ static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout) 
static int ad9832_write_frequency(struct ad9832_state *st,

				  unsigned int addr, unsigned long fout)

{

	unsigned long clk_freq;

	unsigned long regval;



	if (fout > (clk_get_rate(st->mclk) / 2))

	clk_freq = clk_get_rate(st->mclk);



	if (!clk_freq || fout > (clk_freq / 2))

		return -EINVAL;



	regval = ad9832_calc_freqreg(clk_get_rate(st->mclk), fout);

	regval = ad9832_calc_freqreg(clk_freq, fout);



	st->freq_data[0] = cpu_to_be16((AD9832_CMD_FRE8BITSW << CMD_SHIFT) |

					(addr << ADD_SHIFT) |