[PATCH 071/100] ccs-pll: Add sanity checks

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

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/i2c/ccs-pll.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index 84f1735b8df5..1a4fccfc1158 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -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
-- 
2.27.0




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