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-rw-r--r--drivers/i2c/i2c-core.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 361978a..26488aa 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -2140,11 +2140,17 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
break;
}
i2c_unlock_adapter(adapter);
- } else
- res = i2c_smbus_xfer_emulated(adapter, addr, flags, read_write,
- command, protocol, data);
- return res;
+ if (res != -EOPNOTSUPP || !adapter->algo->master_xfer)
+ return res;
+ /*
+ * Fall back to i2c_smbus_xfer_emulated if the adapter doesn't
+ * implement native support for the SMBus operation.
+ */
+ }
+
+ return i2c_smbus_xfer_emulated(adapter, addr, flags, read_write,
+ command, protocol, data);
}
EXPORT_SYMBOL(i2c_smbus_xfer);