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mac80211_hwsim: stop using pointers as cookies

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Instead of using pointers, use sequentially assigned cookies.
This is easier to understand while debugging and also avoids
problems when the pointer is reused for the next allocation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-11-06 11:57:23 +01:00
parent 00eeccc4a9
commit 959eb2fd70
1 changed files with 14 additions and 4 deletions
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18
drivers/net/wireless/mac80211_hwsim.c
View file

@ -517,6 +517,7 @@ struct mac80211_hwsim_data {
bool ps_poll_pending;
struct dentry *debugfs;
uintptr_t pending_cookie;
struct sk_buff_head pending; /* packets pending */
/*
* Only radios in the same group can communicate together (the
@ -963,6 +964,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
unsigned int hwsim_flags = 0;
int i;
struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
uintptr_t cookie;
if (data->ps != PS_DISABLED)
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
@ -1021,7 +1023,10 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
goto nla_put_failure;
/* We create a cookie to identify this skb */
if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
data->pending_cookie++;
cookie = data->pending_cookie;
info->rate_driver_data[0] = (void *)cookie;
if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, cookie))
goto nla_put_failure;
genlmsg_end(skb, msg_head);
@ -2749,7 +2754,7 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
struct mac80211_hwsim_data *data2;
struct ieee80211_tx_info *txi;
struct hwsim_tx_rate *tx_attempts;
unsigned long ret_skb_ptr;
u64 ret_skb_cookie;
struct sk_buff *skb, *tmp;
const u8 *src;
unsigned int hwsim_flags;
@ -2767,7 +2772,7 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
data2 = get_hwsim_data_ref_from_addr(src);
if (!data2)
@ -2775,7 +2780,12 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
/* look for the skb matching the cookie passed back from user */
skb_queue_walk_safe(&data2->pending, skb, tmp) {
if ((unsigned long)skb == ret_skb_ptr) {
u64 skb_cookie;
txi = IEEE80211_SKB_CB(skb);
skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
if (skb_cookie == ret_skb_cookie) {
skb_unlink(skb, &data2->pending);
found = true;
break;