V4L/DVB (11284): Fix i2c code of flexcop-driver for rare revisions

This patch adds a workaround in the i2c-code of the flexcop-driver to
fix support for SkyStar2 rev 2.7. There are not many devices out
there, that's why this bug was not revealed earlier.
Signed-off-by: NPatrick Boettcher <pb@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/b2c2/flexcop-i2c.c

@@ -47,6 +47,18 @@ static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
 	int len = r100.tw_sm_c_100.total_bytes, /* remember total_bytes is buflen-1 */
 		ret;
 
+	/* work-around to have CableStar2 and SkyStar2 rev 2.7 work
+	 * correctly:
+	 *
+	 * the ITD1000 is behind an i2c-gate which closes automatically
+	 * after an i2c-transaction the STV0297 needs 2 consecutive reads
+	 * one with no_base_addr = 0 and one with 1
+	 *
+	 * those two work-arounds are conflictin: we check for the card
+	 * type, it is set when probing the ITD1000 */
+	if (i2c->fc->dev_type == FC_SKY_REV27)
+		r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
+
 	ret = flexcop_i2c_operation(i2c->fc, &r100);
 	if (ret != 0) {
 		deb_i2c("Retrying operation\n");

drivers/media/dvb/frontends/itd1000_priv.h

@@ -31,7 +31,7 @@ struct itd1000_state {
 	/* ugly workaround for flexcop's incapable i2c-controller
 	 * FIXME, if possible
 	 */
-	u8 shadow[255];
+	u8 shadow[256];
 };
 
 enum itd1000_register {