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Subject[PATCH 1/3] i2c: mux: pca954x: merge calls to of_match_device and of_device_get_match_data
Date
Drop call to of_match_device, which is subsumed by the subsequent
call to of_device_get_match_data. The code becomes simpler, and a
temporary variable can be dropped.

The semantic match that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
local idexpression match;
identifier i;
expression x, dev, e, e1;
@@
- match@i = of_match_device(x, dev);
- if (match) e = of_device_get_match_data(dev);
- else e = e1;
+ e = of_device_get_match_data(dev);
+ if (!e) e = e1;

@@
identifier r.i;
@@
- const struct of_device_id *i;
... when != i
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
drivers/i2c/muxes/i2c-mux-pca954x.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
index 09bafd3..ced840f 100644
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -373,7 +373,6 @@ static int pca954x_probe(struct i2c_client *client,
int num, force, class;
struct i2c_mux_core *muxc;
struct pca954x *data;
- const struct of_device_id *match;
int ret;

if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_BYTE))
@@ -394,10 +393,8 @@ static int pca954x_probe(struct i2c_client *client,
if (IS_ERR(gpio))
return PTR_ERR(gpio);

- match = of_match_device(of_match_ptr(pca954x_of_match), &client->dev);
- if (match)
- data->chip = of_device_get_match_data(&client->dev);
- else
+ data->chip = of_device_get_match_data(&client->dev);
+ if (!data->chip)
data->chip = &chips[id->driver_data];

if (data->chip->id.manufacturer_id != I2C_DEVICE_ID_NONE) {
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