[media] rc: fix up and genericize some time unit conversions

The ene_ir driver was using a private define of MS_TO_NS, which is meant
to be microseconds to nanoseconds. The mceusb driver copied it,
intending to use is a milliseconds to microseconds. Lets move the
defines to a common location, expand and standardize them a touch, so
that we now have:

  MS_TO_NS - milliseconds to nanoseconds
  MS_TO_US - milliseconds to microseconds
  US_TO_NS - microseconds to nanoseconds

Reported-by: David Härdeman <david@hardeman.nu>
CC: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 11 insertions, 14 deletions

diff --git a/drivers/media/rc/ene_ir.c b/drivers/media/rc/ene_ir.c
index 885abdddfaa8..1ac49139158d 100644
--- a/drivers/media/rc/ene_ir.c
+++ b/drivers/media/rc/ene_ir.c
@@ -446,27 +446,27 @@ static void ene_rx_setup(struct ene_device *dev)
 
 select_timeout:
         if (dev->rx_fan_input_inuse) {
-                dev->rdev->rx_resolution = MS_TO_NS(ENE_FW_SAMPLE_PERIOD_FAN);
+                dev->rdev->rx_resolution = US_TO_NS(ENE_FW_SAMPLE_PERIOD_FAN);
 
                 /* Fan input doesn't support timeouts, it just ends the
                         input with a maximum sample */
                 dev->rdev->min_timeout = dev->rdev->max_timeout =
-                        MS_TO_NS(ENE_FW_SMPL_BUF_FAN_MSK *
+                        US_TO_NS(ENE_FW_SMPL_BUF_FAN_MSK *
                                 ENE_FW_SAMPLE_PERIOD_FAN);
         } else {
-                dev->rdev->rx_resolution = MS_TO_NS(sample_period);
+                dev->rdev->rx_resolution = US_TO_NS(sample_period);
 
                 /* Theoreticly timeout is unlimited, but we cap it
                  * because it was seen that on one device, it
                  * would stop sending spaces after around 250 msec.
                  * Besides, this is close to 2^32 anyway and timeout is u32.
                  */
-                dev->rdev->min_timeout = MS_TO_NS(127 * sample_period);
-                dev->rdev->max_timeout = MS_TO_NS(200000);
+                dev->rdev->min_timeout = US_TO_NS(127 * sample_period);
+                dev->rdev->max_timeout = US_TO_NS(200000);
         }
 
         if (dev->hw_learning_and_tx_capable)
-                dev->rdev->tx_resolution = MS_TO_NS(sample_period);
+                dev->rdev->tx_resolution = US_TO_NS(sample_period);
 
         if (dev->rdev->timeout > dev->rdev->max_timeout)
                 dev->rdev->timeout = dev->rdev->max_timeout;
@@ -801,7 +801,7 @@ static irqreturn_t ene_isr(int irq, void *data)
 
                 dbg("RX: %d (%s)", hw_sample, pulse ? "pulse" : "space");
 
-                ev.duration = MS_TO_NS(hw_sample);
+                ev.duration = US_TO_NS(hw_sample);
                 ev.pulse = pulse;
                 ir_raw_event_store_with_filter(dev->rdev, &ev);
         }
@@ -821,7 +821,7 @@ static void ene_setup_default_settings(struct ene_device *dev)
         dev->learning_mode_enabled = learning_mode_force;
 
         /* Set reasonable default timeout */
-        dev->rdev->timeout = MS_TO_NS(150000);
+        dev->rdev->timeout = US_TO_NS(150000);
 }
 
 /* Upload all hardware settings at once. Used at load and resume time */
diff --git a/drivers/media/rc/ene_ir.h b/drivers/media/rc/ene_ir.h
index c179baf34cb4..337a41d4450b 100644
--- a/drivers/media/rc/ene_ir.h
+++ b/drivers/media/rc/ene_ir.h
@@ -201,8 +201,6 @@
 #define dbg_verbose(format, ...)        __dbg(2, format, ## __VA_ARGS__)
 #define dbg_regs(format, ...)           __dbg(3, format, ## __VA_ARGS__)
 
-#define MS_TO_NS(msec) ((msec) * 1000)
-
 struct ene_device {
         struct pnp_dev *pnp_dev;
         struct rc_dev *rdev;
diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 0fef6efad537..2d9113493cf0 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -48,7 +48,6 @@
 #define USB_BUFLEN              32 /* USB reception buffer length */
 #define USB_CTRL_MSG_SZ         2  /* Size of usb ctrl msg on gen1 hw */
 #define MCE_G1_INIT_MSGS        40 /* Init messages on gen1 hw to throw out */
-#define MS_TO_NS(msec)          ((msec) * 1000)
 
 /* MCE constants */
 #define MCE_CMDBUF_SIZE         384  /* MCE Command buffer length */
@@ -817,7 +816,7 @@ static void mceusb_handle_command(struct mceusb_dev *ir, int index)
         switch (ir->buf_in[index]) {
         /* 2-byte return value commands */
         case MCE_CMD_S_TIMEOUT:
-                ir->rc->timeout = MS_TO_NS((hi << 8 | lo) / 2);
+                ir->rc->timeout = MS_TO_US((hi << 8 | lo) / 2);
                 break;
 
         /* 1-byte return value commands */
@@ -858,7 +857,7 @@ static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
                         ir->rem--;
                         rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
                         rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK)
-                                         * MS_TO_NS(MCE_TIME_UNIT);
+                                         * MS_TO_US(MCE_TIME_UNIT);
 
                         dev_dbg(ir->dev, "Storing %s with duration %d\n",
                                 rawir.pulse ? "pulse" : "space",
@@ -1061,7 +1060,7 @@ static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir)
         rc->priv = ir;
         rc->driver_type = RC_DRIVER_IR_RAW;
         rc->allowed_protos = RC_TYPE_ALL;
-        rc->timeout = MS_TO_NS(1000);
+        rc->timeout = MS_TO_US(1000);
         if (!ir->flags.no_tx) {
                 rc->s_tx_mask = mceusb_set_tx_mask;
                 rc->s_tx_carrier = mceusb_set_tx_carrier;