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wl12xx: use a bitmask instead of list of booleans in scanned_ch

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We were using an array of booleans to mark the channels we had already
scanned.  This was causing a sparse error, because bool is not a type
with defined size.  To fix this, use bitmasks instead, which is much
cleaner anyway.

Thanks Johannes Berg for the idea.

Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Luciano Coelho 2011-03-21 23:16:14 +02:00
parent 4623ec7d97
commit 4a31c11c7d
3 changed files with 17 additions and 10 deletions
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7
drivers/net/wireless/wl12xx/main.c
View file

@ -1423,8 +1423,7 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl)
if (wl->scan.state != WL1271_SCAN_STATE_IDLE) {
wl->scan.state = WL1271_SCAN_STATE_IDLE;
kfree(wl->scan.scanned_ch);
wl->scan.scanned_ch = NULL;
memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
wl->scan.req = NULL;
ieee80211_scan_completed(wl->hw, true);
}
@ -3502,6 +3501,10 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
wl->hw->wiphy->max_scan_ie_len = WL1271_CMD_TEMPL_MAX_SIZE -
sizeof(struct ieee80211_header);
/* make sure all our channels fit in the scanned_ch bitmask */
BUILD_BUG_ON(ARRAY_SIZE(wl1271_channels) +
ARRAY_SIZE(wl1271_channels_5ghz) >
WL1271_MAX_CHANNELS);
/*
* We keep local copies of the band structs because we need to
* modify them on a per-device basis.

17
drivers/net/wireless/wl12xx/scan.c
View file

@ -48,8 +48,7 @@ void wl1271_scan_complete_work(struct work_struct *work)
goto out;
wl->scan.state = WL1271_SCAN_STATE_IDLE;
kfree(wl->scan.scanned_ch);
wl->scan.scanned_ch = NULL;
memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
wl->scan.req = NULL;
ieee80211_scan_completed(wl->hw, false);
@ -87,7 +86,7 @@ static int wl1271_get_scan_channels(struct wl1271 *wl,
flags = req->channels[i]->flags;
if (!wl->scan.scanned_ch[i] &&
if (!test_bit(i, wl->scan.scanned_ch) &&
!(flags & IEEE80211_CHAN_DISABLED) &&
((!!(flags & IEEE80211_CHAN_PASSIVE_SCAN)) == passive) &&
(req->channels[i]->band == band)) {
@ -124,7 +123,7 @@ static int wl1271_get_scan_channels(struct wl1271 *wl,
memset(&channels[j].bssid_msb, 0xff, 2);
/* Mark the channels we already used */
wl->scan.scanned_ch[i] = true;
set_bit(i, wl->scan.scanned_ch);
j++;
}
@ -291,6 +290,12 @@ void wl1271_scan_stm(struct wl1271 *wl)
int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
struct cfg80211_scan_request *req)
{
/*
* cfg80211 should guarantee that we don't get more channels
* than what we have registered.
*/
BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
return -EBUSY;
@ -304,10 +309,8 @@ int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
}
wl->scan.req = req;
memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
wl->scan.scanned_ch = kcalloc(req->n_channels,
sizeof(*wl->scan.scanned_ch),
GFP_KERNEL);
/* we assume failure so that timeout scenarios are handled correctly */
wl->scan.failed = true;
ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,

3
drivers/net/wireless/wl12xx/wl12xx.h
View file

@ -302,9 +302,10 @@ struct wl1271_rx_mem_pool_addr {
u32 addr_extra;
};
#define WL1271_MAX_CHANNELS 64
struct wl1271_scan {
struct cfg80211_scan_request *req;
bool *scanned_ch;
unsigned long scanned_ch[BITS_TO_LONGS(WL1271_MAX_CHANNELS)];
bool failed;
u8 state;
u8 ssid[IW_ESSID_MAX_SIZE+1];