i2c: bpmp-tegra: Ignore unknown I2C_M flags

cyndis · wsakernel · commit bc1c2048abbe · 2021-01-17T12:17:11.000+01:00
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 &lt;mperttunen@nvidia.com&gt;
Signed-off-by: Wolfram Sang &lt;wsa@kernel.org&gt;
diff --git a/drivers/i2c/busses/i2c-tegra-bpmp.c b/drivers/i2c/busses/i2c-tegra-bpmp.c
@@ -80,7 +80,7 @@ static int tegra_bpmp_xlate_flags(u16 flags, u16 *out)
 		flags &= ~I2C_M_RECV_LEN;
 	}
 
-	return (flags != 0) ? -EINVAL : 0;
+	return 0;
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -80,7 +80,7 @@ static int tegra_bpmp_xlate_flags(u16 flags, u16 *out)`
`80`	`80`	`flags &= ~I2C_M_RECV_LEN;`
`81`	`81`	`}`
`82`	`82`
`83`		`- return (flags != 0) ? -EINVAL : 0;`
	`83`	`+ return 0;`
`84`	`84`	`}`
`85`	`85`
`86`	`86`	`/**`