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Date: Fri, 17 Jan 2020 00:18:37 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Christophe JAILLET <christophe.jaillet@...adoo.fr>, Hans Verkuil <hverkuil-cisco@...all.nl>, Mauro Carvalho Chehab <mchehab+samsung@...nel.org> Subject: [PATCH 4.19 63/84] media: v4l: cadence: Fix how unsued lanes are handled in csi2rx_start() From: Christophe JAILLET <christophe.jaillet@...adoo.fr> commit 2eca8e4c1df4864b937752c3aa2f7925114f4806 upstream. The 2nd parameter of 'find_first_zero_bit()' is a number of bits, not of bytes. So use 'csi2rx->max_lanes' instead of 'sizeof(lanes_used)'. Fixes: 1fc3b37f34f6 ("media: v4l: cadence: Add Cadence MIPI-CSI2 RX driver") Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr> Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/media/platform/cadence/cdns-csi2rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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_pr */ for (i = csi2rx->num_lanes; i < csi2rx->max_lanes; i++) { unsigned int idx = find_first_zero_bit(&lanes_used, - sizeof(lanes_used)); + csi2rx->max_lanes); set_bit(idx, &lanes_used); reg |= CSI2RX_STATIC_CFG_DLANE_MAP(i, i + 1); }
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