disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/media/dvb-frontends/tc90522.c
..
..
@@ -685,10 +685,33 @@
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 		p += new_msgs[j].len;
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 	}
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-	if (i < num)
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+	if (i < num) {
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 		ret = -ENOMEM;
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-	else
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+	} else if (!state->cfg.split_tuner_read_i2c || rd_num == 0) {
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 		ret = i2c_transfer(state->i2c_client->adapter, new_msgs, j);
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+	} else {
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+		/*
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+		 * Split transactions at each I2C_M_RD message.
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+		 * Some of the parent device require this,
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+		 * such as Friio (see. dvb-usb-gl861).
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+		 */
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+		int from, to;
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+
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+		ret = 0;
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+		from = 0;
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+		do {
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+			int r;
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+
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+			to = from + 1;
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+			while (to < j && !(new_msgs[to].flags & I2C_M_RD))
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+				to++;
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+			r = i2c_transfer(state->i2c_client->adapter,
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+					 &new_msgs[from], to - from);
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+			ret = (r <= 0) ? r : ret + r;
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+			from = to;
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+		} while (from < j && ret > 0);
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+	}
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+
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 	if (ret >= 0 && ret < j)
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 		ret = -EIO;
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 	kfree(new_msgs);
..
..
@@ -781,7 +804,7 @@
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 	adap->owner = THIS_MODULE;
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 	adap->algo = &tc90522_tuner_i2c_algo;
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 	adap->dev.parent = &client->dev;
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-	strlcpy(adap->name, "tc90522_sub", sizeof(adap->name));
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+	strscpy(adap->name, "tc90522_sub", sizeof(adap->name));
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 	i2c_set_adapdata(adap, state);
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 	ret = i2c_add_adapter(adap);
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 	if (ret < 0)