[PATCH] media: v4l: cadence: Fix how unsued lanes are handled in 'csi2rx_start()'

[Christophe JAILLET]

The 2nd parameter of 'find_first_zero_bit()' is a number of bits, not of
bytes. So use 'BITS_PER_LONG' instead of 'sizeof(lanes_used)'.

Fixes: 1fc3b37f34f6 ("media: v4l: cadence: Add Cadence MIPI-CSI2 RX driver")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
This patch is purely speculative. Using BITS_PER_LONG looks logical to me,
but I'm not 100% sure that it is what is expected here. 'csi2rx->max_lanes'
could also be a good candidate.
---
 drivers/media/platform/cadence/cdns-csi2rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c 
b/drivers/media/platform/cadence/cdns-csi2rx.c
index 31ace114eda1..28765ccb1b12 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -129,7 +129,7 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx)
         */
        for (i = csi2rx->num_lanes; i < csi2rx->max_lanes; i++) {
                unsigned int idx = find_first_zero_bit(&lanes_used,
-                                                      sizeof(lanes_used));
+                                                      BITS_PER_LONG);
                set_bit(idx, &lanes_used);
                reg |= CSI2RX_STATIC_CFG_DLANE_MAP(i, i + 1);
        }
-- 
2.20.1