linux-kernel - Re: [PATCH 2/2] use list_for_each_entry() for iteration in Prism 54 driver

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Date:	Tue, 29 May 2007 11:38:05 -0400
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	"Matthias Kaehlcke" <matthias.kaehlcke@...il.com>,
	developers@...sm.org, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH 2/2] use list_for_each_entry() for iteration in Prism 54 driver

On 5/27/07, Matthias Kaehlcke <matthias.kaehlcke@...il.com> wrote:
> El Fri, May 25, 2007 at 03:04:44PM +0200 Matthias Kaehlcke ha dit:
>
> > Use list_for_each() in the Prism54 driver to iterate over the MAC list
>
> In response to a similar patch Christoph Hellwig suggests the use of
> list_for_each_entry() instead of list_for_each(). Here is a evolution
> of the patch that takes into account Christophs' suggestion
>
> --
>
> Prism54 driver: Use list_for_each_entry() instead of manual iteration
> and substitute a list_for_each_safe() loop with
> list_for_each_entry_safe()
>
> Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@...il.com>

Singed-off-by: Luis R. Rodriguez <mcgrof@...il.com>

Looks good,

  Luis

> --
>
> diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
> index 283be4a..585f599 100644
> --- a/drivers/net/wireless/prism54/isl_ioctl.c
> +++ b/drivers/net/wireless/prism54/isl_ioctl.c
> @@ -1853,7 +1853,6 @@ prism54_del_mac(struct net_device *ndev, struct iw_request_info *info,
>         islpci_private *priv = netdev_priv(ndev);
>         struct islpci_acl *acl = &priv->acl;
>         struct mac_entry *entry;
> -       struct list_head *ptr;
>         struct sockaddr *addr = (struct sockaddr *) extra;
>
>         if (addr->sa_family != ARPHRD_ETHER)
> @@ -1861,11 +1860,9 @@ prism54_del_mac(struct net_device *ndev, struct iw_request_info *info,
>
>         if (down_interruptible(&acl->sem))
>                 return -ERESTARTSYS;
> -       for (ptr = acl->mac_list.next; ptr != &acl->mac_list; ptr = ptr->next) {
> -               entry = list_entry(ptr, struct mac_entry, _list);
> -
> +       list_for_each_entry(entry, &acl->mac_list, _list) {
>                 if (memcmp(entry->addr, addr->sa_data, ETH_ALEN) == 0) {
> -                       list_del(ptr);
> +                       list_del(&entry->_list);
>                         acl->size--;
>                         kfree(entry);
>                         up(&acl->sem);
> @@ -1883,7 +1880,6 @@ prism54_get_mac(struct net_device *ndev, struct iw_request_info *info,
>         islpci_private *priv = netdev_priv(ndev);
>         struct islpci_acl *acl = &priv->acl;
>         struct mac_entry *entry;
> -       struct list_head *ptr;
>         struct sockaddr *dst = (struct sockaddr *) extra;
>
>         dwrq->length = 0;
> @@ -1891,9 +1887,7 @@ prism54_get_mac(struct net_device *ndev, struct iw_request_info *info,
>         if (down_interruptible(&acl->sem))
>                 return -ERESTARTSYS;
>
> -       for (ptr = acl->mac_list.next; ptr != &acl->mac_list; ptr = ptr->next) {
> -               entry = list_entry(ptr, struct mac_entry, _list);
> -
> +       list_for_each_entry(entry, &acl->mac_list, _list) {
>                 memcpy(dst->sa_data, entry->addr, ETH_ALEN);
>                 dst->sa_family = ARPHRD_ETHER;
>                 dwrq->length++;
> @@ -1960,7 +1954,6 @@ prism54_get_policy(struct net_device *ndev, struct iw_request_info *info,
>  static int
>  prism54_mac_accept(struct islpci_acl *acl, char *mac)
>  {
> -       struct list_head *ptr;
>         struct mac_entry *entry;
>         int res = 0;
>
> @@ -1972,8 +1965,7 @@ prism54_mac_accept(struct islpci_acl *acl, char *mac)
>                 return 1;
>         }
>
> -       for (ptr = acl->mac_list.next; ptr != &acl->mac_list; ptr = ptr->next) {
> -               entry = list_entry(ptr, struct mac_entry, _list);
> +       list_for_each_entry(entry, &acl->mac_list, _list) {
>                 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
>                         res = 1;
>                         break;
> @@ -2216,11 +2208,9 @@ prism54_wpa_bss_ie_init(islpci_private *priv)
>  void
>  prism54_wpa_bss_ie_clean(islpci_private *priv)
>  {
> -       struct list_head *ptr, *n;
> +       struct islpci_bss_wpa_ie *bss, *n;
>
> -       list_for_each_safe(ptr, n, &priv->bss_wpa_list) {
> -               struct islpci_bss_wpa_ie *bss;
> -               bss = list_entry(ptr, struct islpci_bss_wpa_ie, list);
> +       list_for_each_entry_safe(bss, n, &priv->bss_wpa_list, list) {
>                 kfree(bss);
>         }
>  }
>
> --
> Matthias Kaehlcke
> Linux Application Developer
> Barcelona
>
>     I am incapable of conceiving infinity, and yet I do not accept finity
>                           (Simone de Beauvoir)
>                                                                  .''`.
>     using free software / Debian GNU/Linux | http://debian.org  : :'  :
>                                                                 `. `'`
> gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4                  `-
> -
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