[media] dw2102: use symbolic names for dw2102_table indices

dw2102_properties et al refer to entries in the USB-id table using
hard-coded indices, as in "&dw2102_table[6]", which means adding new
entries before the end of the list has the potential to introduce bugs
in code elsewhere in the file.

Use C99-style initializers with symbolic names for each index to avoid
this.  This way, other device tables wanting to reuse the USB ids can
use expressions like "&dw2102_table[TEVII_S630]" that do not change as
the entries in the table are reordered.
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/dw2102.c

@@ -1435,22 +1435,40 @@ static int dw2102_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 	return 0;
 }
 
+enum dw2102_table_entry {
+	CYPRESS_DW2102,
+	CYPRESS_DW2101,
+	CYPRESS_DW2104,
+	TEVII_S650,
+	TERRATEC_CINERGY_S,
+	CYPRESS_DW3101,
+	TEVII_S630,
+	PROF_1100,
+	TEVII_S660,
+	PROF_7500,
+	GENIATECH_SU3000,
+	TERRATEC_CINERGY_S2,
+	TEVII_S480_1,
+	TEVII_S480_2,
+	X3M_SPC1400HD,
+};
+
 static struct usb_device_id dw2102_table[] = {
-	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW2102)},
-	{USB_DEVICE(USB_VID_CYPRESS, 0x2101)},
-	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW2104)},
-	{USB_DEVICE(0x9022, USB_PID_TEVII_S650)},
-	{USB_DEVICE(USB_VID_TERRATEC, USB_PID_CINERGY_S)},
-	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW3101)},
-	{USB_DEVICE(0x9022, USB_PID_TEVII_S630)},
-	{USB_DEVICE(0x3011, USB_PID_PROF_1100)},
-	{USB_DEVICE(0x9022, USB_PID_TEVII_S660)},
-	{USB_DEVICE(0x3034, 0x7500)},
-	{USB_DEVICE(0x1f4d, 0x3000)},
-	{USB_DEVICE(USB_VID_TERRATEC, 0x00a8)},
-	{USB_DEVICE(0x9022, USB_PID_TEVII_S480_1)},
-	{USB_DEVICE(0x9022, USB_PID_TEVII_S480_2)},
-	{USB_DEVICE(0x1f4d, 0x3100)},
+	[CYPRESS_DW2102] = {USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW2102)},
+	[CYPRESS_DW2101] = {USB_DEVICE(USB_VID_CYPRESS, 0x2101)},
+	[CYPRESS_DW2104] = {USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW2104)},
+	[TEVII_S650] = {USB_DEVICE(0x9022, USB_PID_TEVII_S650)},
+	[TERRATEC_CINERGY_S] = {USB_DEVICE(USB_VID_TERRATEC, USB_PID_CINERGY_S)},
+	[CYPRESS_DW3101] = {USB_DEVICE(USB_VID_CYPRESS, USB_PID_DW3101)},
+	[TEVII_S630] = {USB_DEVICE(0x9022, USB_PID_TEVII_S630)},
+	[PROF_1100] = {USB_DEVICE(0x3011, USB_PID_PROF_1100)},
+	[TEVII_S660] = {USB_DEVICE(0x9022, USB_PID_TEVII_S660)},
+	[PROF_7500] = {USB_DEVICE(0x3034, 0x7500)},
+	[GENIATECH_SU3000] = {USB_DEVICE(0x1f4d, 0x3000)},
+	[TERRATEC_CINERGY_S2] = {USB_DEVICE(USB_VID_TERRATEC, 0x00a8)},
+	[TEVII_S480_1] = {USB_DEVICE(0x9022, USB_PID_TEVII_S480_1)},
+	[TEVII_S480_2] = {USB_DEVICE(0x9022, USB_PID_TEVII_S480_2)},
+	[X3M_SPC1400HD] = {USB_DEVICE(0x1f4d, 0x3100)},
 	{ }
 };
 
@@ -1610,15 +1628,15 @@ static struct dvb_usb_device_properties dw2102_properties = {
 	.num_device_descs = 3,
 	.devices = {
 		{"DVBWorld DVB-S 2102 USB2.0",
-			{&dw2102_table[0], NULL},
+			{&dw2102_table[CYPRESS_DW2102], NULL},
 			{NULL},
 		},
 		{"DVBWorld DVB-S 2101 USB2.0",
-			{&dw2102_table[1], NULL},
+			{&dw2102_table[CYPRESS_DW2101], NULL},
 			{NULL},
 		},
 		{"TerraTec Cinergy S USB",
-			{&dw2102_table[4], NULL},
+			{&dw2102_table[TERRATEC_CINERGY_S], NULL},
 			{NULL},
 		},
 	}
@@ -1664,11 +1682,11 @@ static struct dvb_usb_device_properties dw2104_properties = {
 	.num_device_descs = 2,
 	.devices = {
 		{ "DVBWorld DW2104 USB2.0",
-			{&dw2102_table[2], NULL},
+			{&dw2102_table[CYPRESS_DW2104], NULL},
 			{NULL},
 		},
 		{ "TeVii S650 USB2.0",
-			{&dw2102_table[3], NULL},
+			{&dw2102_table[TEVII_S650], NULL},
 			{NULL},
 		},
 	}
@@ -1715,7 +1733,7 @@ static struct dvb_usb_device_properties dw3101_properties = {
 	.num_device_descs = 1,
 	.devices = {
 		{ "DVBWorld DVB-C 3101 USB2.0",
-			{&dw2102_table[5], NULL},
+			{&dw2102_table[CYPRESS_DW3101], NULL},
 			{NULL},
 		},
 	}
@@ -1761,7 +1779,7 @@ static struct dvb_usb_device_properties s6x0_properties = {
 	.num_device_descs = 1,
 	.devices = {
 		{"TeVii S630 USB",
-			{&dw2102_table[6], NULL},
+			{&dw2102_table[TEVII_S630], NULL},
 			{NULL},
 		},
 	}
@@ -1770,33 +1788,33 @@ static struct dvb_usb_device_properties s6x0_properties = {
 struct dvb_usb_device_properties *p1100;
 static struct dvb_usb_device_description d1100 = {
 	"Prof 1100 USB ",
-	{&dw2102_table[7], NULL},
+	{&dw2102_table[PROF_1100], NULL},
 	{NULL},
 };
 
 struct dvb_usb_device_properties *s660;
 static struct dvb_usb_device_description d660 = {
 	"TeVii S660 USB",
-	{&dw2102_table[8], NULL},
+	{&dw2102_table[TEVII_S660], NULL},
 	{NULL},
 };
 
 static struct dvb_usb_device_description d480_1 = {
 	"TeVii S480.1 USB",
-	{&dw2102_table[12], NULL},
+	{&dw2102_table[TEVII_S480_1], NULL},
 	{NULL},
 };
 
 static struct dvb_usb_device_description d480_2 = {
 	"TeVii S480.2 USB",
-	{&dw2102_table[13], NULL},
+	{&dw2102_table[TEVII_S480_2], NULL},
 	{NULL},
 };
 
 struct dvb_usb_device_properties *p7500;
 static struct dvb_usb_device_description d7500 = {
 	"Prof 7500 USB DVB-S2",
-	{&dw2102_table[9], NULL},
+	{&dw2102_table[PROF_7500], NULL},
 	{NULL},
 };
 
@@ -1842,15 +1860,15 @@ static struct dvb_usb_device_properties su3000_properties = {
 	.num_device_descs = 3,
 	.devices = {
 		{ "SU3000HD DVB-S USB2.0",
-			{ &dw2102_table[10], NULL },
+			{ &dw2102_table[GENIATECH_SU3000], NULL },
 			{ NULL },
 		},
 		{ "Terratec Cinergy S2 USB HD",
-			{ &dw2102_table[11], NULL },
+			{ &dw2102_table[TERRATEC_CINERGY_S2], NULL },
 			{ NULL },
 		},
 		{ "X3M TV SPC1400HD PCI",
-			{ &dw2102_table[14], NULL },
+			{ &dw2102_table[X3M_SPC1400HD], NULL },
 			{ NULL },
 		},
 	}