This is a note to let you know that I've just added the patch titled
i2c: designware: Fix RX FIFO depth define on Wangxun 10Gb NIC
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i2c-designware-fix-rx-fifo-depth-define-on-wangxun-1.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f14530fd4241b2d40643598e97da7b56b86ded17
Author: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
Date: Tue Feb 13 14:48:46 2024 +0200
i2c: designware: Fix RX FIFO depth define on Wangxun 10Gb NIC
[ Upstream commit c94612a72ac87b0337a0d85b9263266776ed4190 ]
I believe RX FIFO depth define 0 is incorrect on Wangxun 10Gb NIC. It
must be at least 1 since code is able to read received data from the
DW_IC_DATA_CMD register.
For now this define is irrelevant since the txgbe_i2c_dw_xfer_quirk()
doesn't use the rx_fifo_depth member variable of struct dw_i2c_dev but
is needed when converting code into generic polling mode implementation.
Signed-off-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
Tested-by: Jiawen Wu <jiawenwu@xxxxxxxxxxxxxx>
Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index a7f6f3eafad7d..ae835000fd32a 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -318,7 +318,7 @@ struct dw_i2c_dev {
#define AMD_UCSI_INTR_EN 0xd
#define TXGBE_TX_FIFO_DEPTH 4
-#define TXGBE_RX_FIFO_DEPTH 0
+#define TXGBE_RX_FIFO_DEPTH 1
struct i2c_dw_semaphore_callbacks {
int (*probe)(struct dw_i2c_dev *dev);
