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/Linux-v4.19/drivers/media/usb/gspca/
Dsonixb.c1355 int lum = sd->header[lum_offset] + in sd_pkt_scan() local
1365 if (lum == 0 && sd->prev_avg_lum != 0) { in sd_pkt_scan()
1366 lum = -1; in sd_pkt_scan()
1370 sd->prev_avg_lum = lum; in sd_pkt_scan()
1371 atomic_set(&sd->avg_lum, lum); in sd_pkt_scan()