Coverity: vgxy61_apply_gpiox_strobe_mode(): 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 1527249: Control flow issues (NO_EFFECT) drivers/media/i2c/st-vgxy61.c:891 in vgxy61_apply_gpiox_strobe_mode()

885     					  unsigned int idx)
886     {
887     	static const u8 index2val[] = {0x0, 0x1, 0x3};
888     	u16 reg;
889
890     	reg = vgxy61_read_reg(sensor, VGXY61_REG_SIGNALS_CTRL);
vvv     CID 1527249:  Control flow issues  (NO_EFFECT)
vvv     This less-than-zero comparison of an unsigned value is never true. "reg < 0".
891     	if (reg < 0)
892     		return reg;
893     	reg &= ~(0xf << (idx * VGXY61_SIGNALS_GPIO_ID_SHIFT));
894     	reg |= index2val[mode] << (idx * VGXY61_SIGNALS_GPIO_ID_SHIFT);

895
896 return vgxy61_write_reg(sensor, VGXY61_REG_SIGNALS_CTRL, reg, NULL);

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: 1527249 ("Control flow issues")

Thanks for your attention!

Coverity-bot