From: Wolfram Sang <wsa@the-dreams.de>
Date: Fri, 9 Nov 2018 17:07:32 +0000 (+0100)
Subject: i2c: nvidia-gpu: limit reads also for combined messages
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=39129f28c9431522a6790e7b8c3283221a28447b;p=openwrt%2Fstaging%2Fblogic.git

i2c: nvidia-gpu: limit reads also for combined messages

If the controller can only do 4 byte reads, this needs to be applied for
the read-part of combined messages, too.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fixes: c71bcdcb42a7 ("i2c: add i2c bus driver for NVIDIA GPU")
Acked-by: Ajay Gupta <ajayg@nvidia.com>
Tested-by: Ajay Gupta <ajayg@nvidia.com>
---

diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c
index 4307b42901a1..e99c3bb58351 100644
--- a/drivers/i2c/busses/i2c-nvidia-gpu.c
+++ b/drivers/i2c/busses/i2c-nvidia-gpu.c
@@ -218,6 +218,7 @@ stop:
 
 static const struct i2c_adapter_quirks gpu_i2c_quirks = {
 	.max_read_len = 4,
+	.max_comb_2nd_msg_len = 4,
 	.flags = I2C_AQ_COMB_WRITE_THEN_READ,
 };