Commit d7172c0e authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
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media: ccs-pll: Add sanity checks 



Add sanity checks for fields that could cause division by zero.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 9490a227

drivers/media/i2c/ccs-pll.c

+9 −0
Original line number Diff line number Diff line
@@ -421,6 +421,15 @@ int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *lim, 
		pll->vt_lanes = 1;

	}



	if (!pll->op_lanes || !pll->vt_lanes || !pll->bits_per_pixel ||

	    !pll->ext_clk_freq_hz || !pll->link_freq || !pll->scale_m ||

	    !op_lim_fr->min_pll_ip_clk_freq_hz ||

	    !op_lim_fr->max_pll_ip_clk_freq_hz ||

	    !op_lim_fr->min_pll_op_clk_freq_hz ||

	    !op_lim_fr->max_pll_op_clk_freq_hz ||

	    !op_lim_bk->max_sys_clk_div || !op_lim_fr->max_pll_multiplier)

		return -EINVAL;



	/*

	 * Make sure op_pix_clk_div will be integer --- unless flexible

	 * op_pix_clk_div is supported