last_gain 544 drivers/media/usb/pwc/pwc-v4l.c pdev->gain->val = pdev->last_gain; last_gain 551 drivers/media/usb/pwc/pwc-v4l.c pdev->last_gain = pdev->gain->val; last_gain 307 drivers/media/usb/pwc/pwc.h s32 last_gain;