[media] mt9v032: fix hblank calculation
Since (min_row_time - crop->width) can be negative, we have to do a signed comparison here. Otherwise max_t casts the negative value to unsigned int and sets min_hblank to that invalid value. Cc: stable@vger.kernel.org Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -305,8 +305,8 @@ mt9v032_update_hblank(struct mt9v032 *mt9v032)
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if (mt9v032->version->version == MT9V034_CHIP_ID_REV1)
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min_hblank += (mt9v032->hratio - 1) * 10;
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min_hblank = max_t(unsigned int, (int)mt9v032->model->data->min_row_time - crop->width,
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(int)min_hblank);
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min_hblank = max_t(int, mt9v032->model->data->min_row_time - crop->width,
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min_hblank);
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hblank = max_t(unsigned int, mt9v032->hblank, min_hblank);
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return mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING, hblank);
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