From: Joe Perches <joe@perches.com>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
akarwar@marvell.com, nishants@marvell.com, kvalo@codeaurora.org
Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] mwifiex: scan: Simplify code
Date: Wed, 31 Aug 2016 08:09:10 -0700 [thread overview]
Message-ID: <1472656150.4176.7.camel@perches.com> (raw)
In-Reply-To: <1472644259-15605-1-git-send-email-christophe.jaillet@wanadoo.fr>
On Wed, 2016-08-31 at 13:50 +0200, Christophe JAILLET wrote:
> This patch:
> - improves code layout
> - removes a useless memset(0) for some memory allocated with kzalloc
> - removes a useless if. We know that 'if (chan_band_tlv)' will succeed
> because it has been tested a few lines above
True, the code above it is also confusing as it's
#ifdef CONFIG_PM
if (priv->wdev.wiphy->wowlan_config)
nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
#endif
if (nd_config) {
adapter->nd_info =
kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
sizeof(struct cfg80211_wowlan_nd_match *) *
scan_rsp->number_of_sets, GFP_ATOMIC);
if (adapter->nd_info)
adapter->nd_info->n_matches = scan_rsp->number_of_sets;
}
where nd_config is a pointer already initialized to NULL
so the #endif seems misplaced.
> diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c
[]
> @@ -2179,18 +2179,14 @@ int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
>
> if (chan_band_tlv && adapter->nd_info) {
> adapter->nd_info->matches[idx] =
> - kzalloc(sizeof(*pmatch) +
> - sizeof(u32), GFP_ATOMIC);
> + kzalloc(sizeof(*pmatch) + sizeof(u32),
> + GFP_ATOMIC);
>
> pmatch = adapter->nd_info->matches[idx];
>
> if (pmatch) {
> - memset(pmatch, 0, sizeof(*pmatch));
> - if (chan_band_tlv) {
> - pmatch->n_channels = 1;
> - pmatch->channels[0] =
> - chan_band->chan_number;
> - }
> + pmatch->n_channels = 1;
> + pmatch->channels[0] = chan_band->chan_number;
> }
> }
Maybe it'd be better to move the pmatch declaration to this block
and alloc to pmatch then assign adapter->nd_info->matches[idx]
later.
I think the #ifdef CONFIG_PM use in this routine is incomplete.
next prev parent reply other threads:[~2016-08-31 15:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-31 11:50 [PATCH] mwifiex: scan: Simplify code Christophe JAILLET
2016-08-31 15:09 ` Joe Perches [this message]
2016-09-09 9:21 ` Kalle Valo
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