update comment and clear mac field if EEPROM read failed

1 files changed, 15 insertions, 3 deletions

diff --git a/linux/drivers/media/dvb/ttpci/ttpci-eeprom.c b/linux/drivers/media/dvb/ttpci/ttpci-eeprom.c
index aa9c68f0b..3f02e8068 100644
--- a/linux/drivers/media/dvb/ttpci/ttpci-eeprom.c
+++ b/linux/drivers/media/dvb/ttpci/ttpci-eeprom.c
@@ -1,6 +1,15 @@
 /*
-    Retrieve encoded MAC address from ATMEL ttpci_eeprom serial 2-wire EEPROM,
-    decode it and store it in associated adapter net device
+    Retrieve encoded MAC address from 24C16 serial 2-wire EEPROM,
+    decode it and store it in the associated adapter struct for
+    use by dvb_net.c
+
+    This code was tested on TT-Budget/WinTV-NOVA-CI PCI boards with
+    Atmel and ST Microelectronics EEPROMs.
+
+    This card appear to have the 24C16 write protect held to ground,
+    thus permitting normal read/write operation. Theoretically it
+    would be possible to write routines to burn a different (encoded)
+    MAC address into the EEPROM.
 
     Robert Schlabbach	GMX
     Michael Glaum	KVH Industries
@@ -90,6 +99,7 @@ int ttpci_eeprom_parse_mac (struct dvb_i2c_bus *i2c)
 
 	if (ret != 0) { // Will only be -ENODEV
 		dprintk("Couldn't read from EEPROM: not there?\n");
+		memset(i2c->adapter->proposed_mac, 0, 6); 
 		return ret;
 	}
 
@@ -100,7 +110,9 @@ int ttpci_eeprom_parse_mac (struct dvb_i2c_bus *i2c)
 		i2c->adapter->name, i2c->adapter->num,
 		decodedMAC[0],decodedMAC[1],decodedMAC[2],
 		decodedMAC[3],decodedMAC[4],decodedMAC[5]);
-
+	dprintk("encoded MAC was %x:%x:%x:%x:%x:%x\n",
+		encodedMAC[0],encodedMAC[1],encodedMAC[2],
+		encodedMAC[3],encodedMAC[4],encodedMAC[5]);
 	return 0;
 }