diff options
| author | Marek Vasut <marex@denx.de> | 2021-08-23 23:41:45 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2021-09-14 12:22:54 +0200 |
| commit | 294b29f15469e90893c2b72a738a962ee02a12eb (patch) | |
| tree | afa534f6aa9756dfb1979eea5456b17a531f5835 /drivers | |
| parent | i2c: xiic: Only ever transfer single message (diff) | |
| download | linux-294b29f15469e90893c2b72a738a962ee02a12eb.tar.xz linux-294b29f15469e90893c2b72a738a962ee02a12eb.zip | |
i2c: xiic: Fix RX IRQ busy check
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@denx.de>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-xiic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index 6cd7830fe489..eb789cfb9973 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -543,7 +543,7 @@ 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 |