V4L/DVB (9430): stb0899: avoid parameter overwriting

BUG! Setting CRL parameter overwrote the CR Algorithm type,
eventually leading to wrong search algorithm to be employed in
the DVB-S carrier loop optimization.

Symptom: Once the CR optimization stage is passed either way, in
a successful or failed manner, the very next carrier search will
fail, due to no Carrier Search Algorithm specified.

Signed-off-by: Arvo Jarve <arvo@softshark.ee>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/frontends/stb0899_algo.c b/drivers/media/dvb/frontends/stb0899_algo.c
index 17f0311..37717a4 100644 (file)
--- a/drivers/media/dvb/frontends/stb0899_algo.c
+++ b/drivers/media/dvb/frontends/stb0899_algo.c
@@ -675,7 +675,6 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
        /* Set the timing loop to tracking      */
        stb0899_write_reg(state, STB0899_RTC, 0x33);
        stb0899_write_reg(state, STB0899_CFD, 0xf7);
-       reg = 0;
        /* if locked and range ok, set Kdiv     */
        if (internal->status == RANGEOK) {
                dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !");
@@ -686,45 +685,35 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
                 * Carrier loop optimization versus
                 * symbol Rate/Puncture Rate for Tracking
                 */
+               reg = stb0899_read_reg(state, STB0899_BCLC);
                switch (internal->fecrate) {
                case STB0899_FEC_1_2:           /* 13   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 0x1a);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
-                       reg = 0;
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a);
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_2_3:           /* 18   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 44);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
-                       reg = 0;
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 44);
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_3_4:           /* 21   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
-                       reg = 0;
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 60);
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_5_6:           /* 24   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 75);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
-                       reg = 0;
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 75);
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;
                case STB0899_FEC_6_7:           /* 25   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 88);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 88);
                        stb0899_write_reg(state, STB0899_ACLC, 0x88);
                        stb0899_write_reg(state, STB0899_BCLC, 0x9a);
                        break;
                case STB0899_FEC_7_8:           /* 26   */
-                       STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 94);
-                       stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
-                       reg = 0;
+                       stb0899_write_reg(state, STB0899_DEMAPVIT, 94);
                        STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]);
                        stb0899_write_reg(state, STB0899_BCLC, reg);
                        break;