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[media] fc2580: fix tuning failure on 32-bit arch

Bladeren bron 
There was some frequency calculation overflows which caused tuning
failure on 32-bit architecture. Use 64-bit numbers where needed in
order to avoid calculation overflows.

Thanks for the Finnish person, who asked remain anonymous, reporting,
testing and suggesting the fix.

Cc: <stable@vger.kernel.org>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari
2014-04-10 21:18:16 -03:00
gecommit door Mauro Carvalho Chehab
bovenliggende 877ed14306
commit 8845cc6415
2 gewijzigde bestanden met toevoegingen van 4 en 3 verwijderingen
Download Patch-bestand Download Diff-bestand Expand all files Collapse all files

6
drivers/media/tuners/fc2580.c
Bestand weergeven

@@ -195,7 +195,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
f_ref = 2UL * priv->cfg->clock / r_val;
n_val = div_u64_rem(f_vco, f_ref, &k_val);
k_val_reg = 1UL * k_val * (1 << 20) / f_ref;
k_val_reg = div_u64(1ULL * k_val * (1 << 20), f_ref);
ret = fc2580_wr_reg(priv, 0x18, r18_val | ((k_val_reg >> 16) & 0xff));
if (ret < 0)
@@ -348,8 +348,8 @@ static int fc2580_set_params(struct dvb_frontend *fe)
if (ret < 0)
goto err;
ret = fc2580_wr_reg(priv, 0x37, 1UL * priv->cfg->clock * \
fc2580_if_filter_lut[i].mul / 1000000000);
ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->cfg->clock *
fc2580_if_filter_lut[i].mul, 1000000000));
if (ret < 0)
goto err;