Coverity: vgxy61_configure(): Control flow issues

Hello!

This is an experimental semi-automated report about issues detected by Coverity from a scan of next-20221110 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified lines of code (noted below) that were touched by commits:

Thu Oct 27 14:37:38 2022 +0300

    153e4ad44d60 ("media: i2c: Add driver for ST VGXY61 camera sensor")

Coverity reported the following:

*** CID 1527253: Control flow issues (NO_EFFECT) drivers/media/i2c/st-vgxy61.c:1579 in vgxy61_configure()

1573     	/* Frequency to data rate is 1:1 ratio for MIPI */
1574     	sensor->data_rate_in_mbps = sensor_freq;
1575     	/* Video timing ISP path (pixel clock)  requires 804/5 mhz = 160 mhz */
1576     	sensor->pclk = sensor_freq / 5;

1577
1578 line_length = vgxy61_read_reg(sensor, VGXY61_REG_LINE_LENGTH);
vvv CID 1527253: Control flow issues (NO_EFFECT)
vvv This less-than-zero comparison of an unsigned value is never true. "line_length < 0".

1579     	if (line_length < 0)
1580     		return line_length;
1581     	sensor->line_length = line_length;
1582     	vgxy61_write_reg(sensor, VGXY61_REG_EXT_CLOCK, sensor->clk_freq, &ret);
1583     	vgxy61_write_reg(sensor, VGXY61_REG_CLK_PLL_PREDIV, prediv, &ret);
1584     	vgxy61_write_reg(sensor, VGXY61_REG_CLK_SYS_PLL_MULT, mult, &ret);

If this is a false positive, please let us know so we can mark it as such, or teach the Coverity rules to be smarter. If not, please make sure fixes get into linux-next. :) For patches fixing this, please include these lines (but double-check the "Fixes" first):

Addresses-Coverity-ID: 1527253 ("Control flow issues")

Thanks for your attention!

Coverity-bot