V4L/DVB (11877): lgdt3305: fix 64bit division in function lgdt3305_set_if (511da457) · Commits · 戴 / test

drivers/media/dvb/frontends/lgdt3305.c

+3 −14

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		*
		*/

		#include <asm/div64.h>
		#include <linux/dvb/frontend.h>
		#include "dvb_math.h"
		#include "lgdt3305.h"
		@@ -496,27 +497,15 @@ static int lgdt3305_set_if(struct lgdt3305_state *state,

		nco = if_freq_khz / 10;

		#define LGDT3305_64BIT_DIVISION_ENABLED 0
		/* FIXME: 64bit division disabled to avoid linking error:
		* WARNING: "__udivdi3" [lgdt3305.ko] undefined!
		*/
		switch (param->u.vsb.modulation) {
		case VSB_8:
		#if LGDT3305_64BIT_DIVISION_ENABLED
		nco <<= 24;
		nco /= 625;
		#else
		nco *= ((1 << 24) / 625);
		#endif
		do_div(nco, 625);
		break;
		case QAM_64:
		case QAM_256:
		#if LGDT3305_64BIT_DIVISION_ENABLED
		nco <<= 28;
		nco /= 625;
		#else
		nco *= ((1 << 28) / 625);
		#endif
		do_div(nco, 625);
		break;
		default:
		return -EINVAL;