[PATCH] ath9k: remove useless if-before-kfree; correct misleading indentation

[Jim Meyering]

---
Marcel Holtmann <holtmann@xxxxxxxxxxxxxxx> wrote:
> Hi Jim
>
>> Alternatively, you could remove the nowadays-useless
>> "if-before-kfree" test and leave the sometimes-redundant
>> assignment as-is: unconditional.
>
> actually the later one is preferred. Just remove the NULL check.

I prefer it, too, but the indentation suggested that
adding braces would match the author's intent.

In case anyone is interested, I have been maintaining a patch
that removes *all* useless if-before-kfree tests.  I have not
posted it because such changes have a reputation for provoking
flames on this list, but now you've provoked me ;-)

    http://meyering.net/code/remove-useless-if-before-kfree.patch
     74 files changed, 127 insertions(+), 250 deletions(-)

Here's the alternative patch:

 drivers/net/wireless/ath9k/main.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 2888778..6eb7ad7 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1056,9 +1056,8 @@ void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 	if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
 		tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 		/* free driver's private data area of tx_info */
-		if (tx_info->driver_data[0] != NULL)
-			kfree(tx_info->driver_data[0]);
-			tx_info->driver_data[0] = NULL;
+		kfree(tx_info->driver_data[0]);
+		tx_info->driver_data[0] = NULL;
 	}

 	if (tx_status->flags & ATH_TX_BAR) {
-- 
1.6.0.90.g436ed

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