[media] mceusb: make transmit work on HP transceiver

This transceiver expects the set IR TX ports and IR data as seperate
packets, like the Windows driver does. Remove unnecessary kzalloc.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 14 deletions

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 14fea35e5d67..bdd1ed8e406e 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -62,7 +62,6 @@
 #define MCE_PACKET_SIZE         4    /* Normal length of packet (without header) */
 #define MCE_IRDATA_HEADER       0x84 /* Actual header format is 0x80 + num_bytes */
 #define MCE_IRDATA_TRAILER      0x80 /* End of IR data */
-#define MCE_TX_HEADER_LENGTH    3    /* # of bytes in the initializing tx header */
 #define MCE_MAX_CHANNELS        2    /* Two transmitters, hardware dependent? */
 #define MCE_DEFAULT_TX_MASK     0x03 /* Vals: TX1=0x01, TX2=0x02, ALL=0x03 */
 #define MCE_PULSE_BIT           0x80 /* Pulse bit, MSB set == PULSE else SPACE */
@@ -366,7 +365,8 @@ static struct usb_device_id mceusb_dev_table[] = {
         /* Formosa Industrial Computing */
         { USB_DEVICE(VENDOR_FORMOSA, 0xe042) },
         /* Fintek eHome Infrared Transceiver (HP branded) */
-        { USB_DEVICE(VENDOR_FINTEK, 0x5168) },
+        { USB_DEVICE(VENDOR_FINTEK, 0x5168),
+          .driver_info = MCE_GEN2_TX_INV },
         /* Fintek eHome Infrared Transceiver */
         { USB_DEVICE(VENDOR_FINTEK, 0x0602) },
         /* Fintek eHome Infrared Transceiver (in the AOpen MP45) */
@@ -789,19 +789,19 @@ static void mce_flush_rx_buffer(struct mceusb_dev *ir, int size)
 static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 {
         struct mceusb_dev *ir = dev->priv;
-        int i, ret = 0;
+        int i, length, ret = 0;
         int cmdcount = 0;
-        unsigned char *cmdbuf; /* MCE command buffer */
-
-        cmdbuf = kzalloc(sizeof(unsigned) * MCE_CMDBUF_SIZE, GFP_KERNEL);
-        if (!cmdbuf)
-                return -ENOMEM;
+        unsigned char cmdbuf[MCE_CMDBUF_SIZE];
 
         /* MCE tx init header */
         cmdbuf[cmdcount++] = MCE_CMD_PORT_IR;
         cmdbuf[cmdcount++] = MCE_CMD_SETIRTXPORTS;
         cmdbuf[cmdcount++] = ir->tx_mask;
 
+        /* Send the set TX ports command */
+        mce_async_out(ir, cmdbuf, cmdcount);
+        cmdcount = 0;
+
         /* Generate mce packet data */
         for (i = 0; (i < count) && (cmdcount < MCE_CMDBUF_SIZE); i++) {
                 txbuf[i] = txbuf[i] / MCE_TIME_UNIT;
@@ -810,8 +810,7 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 
                         /* Insert mce packet header every 4th entry */
                         if ((cmdcount < MCE_CMDBUF_SIZE) &&
-                            (cmdcount - MCE_TX_HEADER_LENGTH) %
-                             MCE_CODE_LENGTH == 0)
+                            (cmdcount % MCE_CODE_LENGTH) == 0)
                                 cmdbuf[cmdcount++] = MCE_IRDATA_HEADER;
 
                         /* Insert mce packet data */
@@ -830,9 +829,8 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
         }
 
         /* Fix packet length in last header */
-        cmdbuf[cmdcount - (cmdcount - MCE_TX_HEADER_LENGTH) % MCE_CODE_LENGTH] =
-                MCE_COMMAND_IRDATA + (cmdcount - MCE_TX_HEADER_LENGTH) %
-                MCE_CODE_LENGTH - 1;
+        length = cmdcount % MCE_CODE_LENGTH;
+        cmdbuf[cmdcount - length] -= MCE_CODE_LENGTH - length;
 
         /* Check if we have room for the empty packet at the end */
         if (cmdcount >= MCE_CMDBUF_SIZE) {
@@ -847,7 +845,6 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
         mce_async_out(ir, cmdbuf, cmdcount);
 
 out:
-        kfree(cmdbuf);
         return ret ? ret : count;
 }