[PATCH v3 03/11] media: ccs-pll: Check for too high VT PLL multiplier in dual PLL case

[Sakari Ailus <sakari.ailus@linux.intel.com>]

The check for VT PLL upper limit in dual PLL case was missing. Add it now.

Fixes: 6c7469e46b60 ("media: ccs-pll: Add trivial dual PLL support")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/i2c/ccs-pll.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/i2c/ccs-pll.c b/drivers/media/i2c/ccs-pll.c
index 2399cd6509b7..266fcd160da6 100644
--- a/drivers/media/i2c/ccs-pll.c
+++ b/drivers/media/i2c/ccs-pll.c
@@ -312,6 +312,11 @@ __ccs_pll_calculate_vt_tree(struct device *dev,
 	dev_dbg(dev, "more_mul2: %u\n", more_mul);
 
 	pll_fr->pll_multiplier = mul * more_mul;
+	if (pll_fr->pll_multiplier > lim_fr->max_pll_multiplier) {
+		dev_dbg(dev, "pll multiplier %u too high\n",
+			pll_fr->pll_multiplier);
+		return -EINVAL;
+	}
 
 	if (pll_fr->pll_multiplier * pll_fr->pll_ip_clk_freq_hz >
 	    lim_fr->max_pll_op_clk_freq_hz)
-- 
2.39.5