[PATCH 4.19 01/58] i2c: bpmp-tegra: Ignore unknown I2C_M flags

Greg Kroah-Hartman
2021-01-26T08:20:30Z

From: Mikko Perttunen <mperttunen@nvidia.com>

commit bc1c2048abbe3c3074b4de91d213595c57741a6b upstream.

In order to not to start returning errors when new I2C_M flags are
added, change behavior to just ignore all flags that we don't know
about. This includes the I2C_M_DMA_SAFE flag that already exists but
causes -EINVAL to be returned for valid transactions.

Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/i2c/busses/i2c-tegra-bpmp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-tegra-bpmp.c
+++ b/drivers/i2c/busses/i2c-tegra-bpmp.c
@@ -91,7 +91,7 @@ static int tegra_bpmp_xlate_flags(u16 fl
flags &= ~I2C_M_RECV_LEN;
}

- return (flags != 0) ? -EINVAL : 0;
+ return 0;
}

/**