[media] mb86a20s: Use a macro for the number of layers

Instead of using the magic number "3", use NUM_LAYERS macro
on all places that are related to the ISDB-T layers.
This makes the source code a little more readable.
No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 17 insertions, 15 deletions

diff --git a/drivers/media/dvb-frontends/mb86a20s.c b/drivers/media/dvb-frontends/mb86a20s.c
index d04b52e3f4cc..80a8ee090c80 100644
--- a/drivers/media/dvb-frontends/mb86a20s.c
+++ b/drivers/media/dvb-frontends/mb86a20s.c
@@ -20,6 +20,8 @@
 #include "dvb_frontend.h"
 #include "mb86a20s.h"
 
+#define NUM_LAYERS 3
+
 static int debug = 1;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
@@ -48,7 +50,7 @@ struct mb86a20s_state {
         bool inversion;
         u32 subchannel;
 
-        u32 estimated_rate[3];
+        u32 estimated_rate[NUM_LAYERS];
         unsigned long get_strength_time;
 
         bool need_init;
@@ -666,7 +668,7 @@ static int mb86a20s_get_frontend(struct dvb_frontend *fe)
 
         /* Get per-layer data */
 
-        for (i = 0; i < 3; i++) {
+        for (i = 0; i < NUM_LAYERS; i++) {
                 dev_dbg(&state->i2c->dev, "%s: getting data for layer %c.\n",
                         __func__, 'A' + i);
 
@@ -828,7 +830,7 @@ static int mb86a20s_get_pre_ber(struct dvb_frontend *fe,
 
         dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
 
-        if (layer >= 3)
+        if (layer >= NUM_LAYERS)
                 return -EINVAL;
 
         /* Check if the BER measures are already available */
@@ -962,7 +964,7 @@ static int mb86a20s_get_post_ber(struct dvb_frontend *fe,
 
         dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
 
-        if (layer >= 3)
+        if (layer >= NUM_LAYERS)
                 return -EINVAL;
 
         /* Check if the BER measures are already available */
@@ -1089,7 +1091,7 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
         u32 collect_rate;
         dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
 
-        if (layer >= 3)
+        if (layer >= NUM_LAYERS)
                 return -EINVAL;
 
         /* Check if the PER measures are already available */
@@ -1476,7 +1478,7 @@ static int mb86a20s_get_blk_error_layer_CNR(struct dvb_frontend *fe)
         }
 
         /* Read all layers */
-        for (i = 0; i < 3; i++) {
+        for (i = 0; i < NUM_LAYERS; i++) {
                 if (!(c->isdbt_layer_enabled & (1 << i))) {
                         c->cnr.stat[1 + i].scale = FE_SCALE_NOT_AVAILABLE;
                         continue;
@@ -1565,20 +1567,20 @@ static void mb86a20s_stats_not_ready(struct dvb_frontend *fe)
         c->strength.len = 1;
 
         /* Per-layer stats - 3 layers + global */
-        c->cnr.len = 4;
-        c->pre_bit_error.len = 4;
-        c->pre_bit_count.len = 4;
-        c->post_bit_error.len = 4;
-        c->post_bit_count.len = 4;
-        c->block_error.len = 4;
-        c->block_count.len = 4;
+        c->cnr.len = NUM_LAYERS + 1;
+        c->pre_bit_error.len = NUM_LAYERS + 1;
+        c->pre_bit_count.len = NUM_LAYERS + 1;
+        c->post_bit_error.len = NUM_LAYERS + 1;
+        c->post_bit_count.len = NUM_LAYERS + 1;
+        c->block_error.len = NUM_LAYERS + 1;
+        c->block_count.len = NUM_LAYERS + 1;
 
         /* Signal is always available */
         c->strength.stat[0].scale = FE_SCALE_RELATIVE;
         c->strength.stat[0].uvalue = 0;
 
         /* Put all of them at FE_SCALE_NOT_AVAILABLE */
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < NUM_LAYERS + 1; i++) {
                 c->cnr.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
                 c->pre_bit_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
                 c->pre_bit_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
@@ -1617,7 +1619,7 @@ static int mb86a20s_get_stats(struct dvb_frontend *fe, int status_nr)
         if (status_nr < 9)
                 return 0;
 
-        for (i = 0; i < 3; i++) {
+        for (i = 0; i < NUM_LAYERS; i++) {
                 if (c->isdbt_layer_enabled & (1 << i)) {
                         /* Layer is active and has rc segments */
                         active_layers++;