3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpen...@oracle.com>

commit 5bc9ad774c063f6b41965e7314f2c26aa5e465a0 upstream.

Gcc 4.6.2 complains that:

  drivers/leds/leds-lp5521.c: In function `lp5521_load_program':
  drivers/leds/leds-lp5521.c:214:21: warning: `mode' may be used uninitialized 
in this function [-Wuninitialized]
  drivers/leds/leds-lp5521.c: In function `lp5521_probe':
  drivers/leds/leds-lp5521.c:788:5: warning: `buf' may be used uninitialized in 
this function [-Wuninitialized]
  drivers/leds/leds-lp5521.c:740:6: warning: `ret' may be used uninitialized in 
this function [-Wuninitialized]

These are real problems if lp5521_read() returns an error.  When that
happens we should handle it, instead of ignoring it or doing a bitwise
OR with all the other error codes and continuing.

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Cc: Milo <milo....@ti.com>
Cc: Richard Purdie <rpur...@rpsys.net>
Cc: Bryan Wu <bryan...@canonical.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 drivers/leds/leds-lp5521.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 410a723..2381562 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -193,9 +193,14 @@ static int lp5521_load_program(struct lp5521_engine *eng, 
const u8 *pattern)
 
        /* move current engine to direct mode and remember the state */
        ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT);
+       if (ret)
+               return ret;
+
        /* Mode change requires min 500 us delay. 1 - 2 ms  with margin */
        usleep_range(1000, 2000);
-       ret |= lp5521_read(client, LP5521_REG_OP_MODE, &mode);
+       ret = lp5521_read(client, LP5521_REG_OP_MODE, &mode);
+       if (ret)
+               return ret;
 
        /* For loading, all the engines to load mode */
        lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
@@ -211,8 +216,7 @@ static int lp5521_load_program(struct lp5521_engine *eng, 
const u8 *pattern)
                                LP5521_PROG_MEM_SIZE,
                                pattern);
 
-       ret |= lp5521_write(client, LP5521_REG_OP_MODE, mode);
-       return ret;
+       return lp5521_write(client, LP5521_REG_OP_MODE, mode);
 }
 
 static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr)
@@ -785,7 +789,7 @@ static int __devinit lp5521_probe(struct i2c_client *client,
         * LP5521_REG_ENABLE register will not have any effect - strange!
         */
        ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf);
-       if (buf != LP5521_REG_R_CURR_DEFAULT) {
+       if (ret || buf != LP5521_REG_R_CURR_DEFAULT) {
                dev_err(&client->dev, "error in resetting chip\n");
                goto fail2;
        }


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to