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media: camss-vfe: always initialize reg at vfe_set_xbar_cfg()

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[ Upstream commit 9917fbcfa2 ]

if output->wm_num is bigger than 2, the value for reg is
not initialized, as warned by smatch:
	drivers/media/platform/qcom/camss-8x16/camss-vfe.c:633 vfe_set_xbar_cfg() error: uninitialized symbol 'reg'.
	drivers/media/platform/qcom/camss-8x16/camss-vfe.c:637 vfe_set_xbar_cfg() error: uninitialized symbol 'reg'.

That shouldn't happen in practice, so add a logic that will
break the loop if i > 1, fixing the warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mauro Carvalho Chehab 2017-11-01 08:09:59 -04:00 committed by Greg Kroah-Hartman
parent de0bbe07a4
commit d9e497c942
1 changed files with 3 additions and 0 deletions
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3
drivers/media/platform/qcom/camss-8x16/camss-vfe.c
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@ -622,6 +622,9 @@ static void vfe_set_xbar_cfg(struct vfe_device *vfe, struct vfe_output *output,
reg = VFE_0_BUS_XBAR_CFG_x_M_PAIR_STREAM_EN;
if (p == V4L2_PIX_FMT_NV12 || p == V4L2_PIX_FMT_NV16)
reg |= VFE_0_BUS_XBAR_CFG_x_M_PAIR_STREAM_SWAP_INTER_INTRA;
} else {
/* On current devices output->wm_num is always <= 2 */
break;
}
if (output->wm_idx[i] % 2 == 1)