This is a note to let you know that I've just added the patch titled
i2c: xiic: Fix RX IRQ busy check
to the 5.15-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-xiic-fix-rx-irq-busy-check.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 068cb3cc3f6f2b9058a627aef8d98a4415a10c61
Author: Marek Vasut <marex@xxxxxxx>
Date: Mon Aug 23 23:41:45 2021 +0200
i2c: xiic: Fix RX IRQ busy check
[ Upstream commit 294b29f15469e90893c2b72a738a962ee02a12eb ]
In case the XIIC does TX/RX transfer, make sure no other kernel thread
can start another TX transfer at the same time. This could happen since
the driver only checks tx_msg for being non-NULL and returns -EBUSY in
that case, however it is necessary to check also rx_msg for the same.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Acked-by: Michal Simek <michal.simek@xxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Stable-dep-of: 1d4a1adbed25 ("i2c: xiic: Try re-initialization on bus busy timeout")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index b5368d11b5240..3444e4d017f7f 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -545,7 +545,7 @@ static int xiic_busy(struct xiic_i2c *i2c)
int tries = 3;
int err;
- if (i2c->tx_msg)
+ if (i2c->tx_msg || i2c->rx_msg)
return -EBUSY;
/* In single master mode bus can only be busy, when in use by this
