Re: [PATCH bluetooth-next] ieee802154/mrf24j40: make sure we do not override return values

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Hello.

On 09/06/15 09:42, Marcel Holtmann wrote:
Hi Stefan,

If we run into an error during rx we set the the error code in ret, but override
it afterwards. Using a different variable for the extra case avoids this
situation.

CID: 1226982, 1226983
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
Cc: Alan Ott <alan@xxxxxxxxxxx>
---
drivers/net/ieee802154/mrf24j40.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 99c7676..0b9b2ae 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -533,6 +533,7 @@ static int mrf24j40_handle_rx(struct mrf24j40 *devrec)
	u8 lqi = 0;
	u8 val;
	int ret = 0;
+	int ret2 = 0;
	struct sk_buff *skb;

	/* Turn off reception of packets off the air. This prevents the
@@ -569,9 +570,9 @@ static int mrf24j40_handle_rx(struct mrf24j40 *devrec)

out:
	/* Turn back on reception of packets off the air. */
-	ret = read_short_reg(devrec, REG_BBREG1, &val);
-	if (ret)
-		return ret;
+	ret2 = read_short_reg(devrec, REG_BBREG1, &val);
+	if (ret2)
+		return ret2;
one of the general rule is to not declare a variable and assign it with a value unless really needed. In this case I think a simple int ret2; would be enough.

Fair enough. I just followed what was there already. Patch v2 send.

regards
Stefan Schmidt
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