wl12xx: wakeup chip from ELP during scan
Commands are sometimes sent to FW on scan completion. Make sure the chip
is awake to receive them. Sending commands while the chip is in ELP
can cause SDIO read errors and/or crash the FW.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index 97ffd7a..f0aa7ab 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -63,6 +63,7 @@
cmd->status = 0;
WARN_ON(len % 4 != 0);
+ WARN_ON(test_bit(WL1271_FLAG_IN_ELP, &wl->flags));
wl1271_write(wl, wl->cmd_box_addr, buf, len, false);
diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c
index 6f897b9..420653a 100644
--- a/drivers/net/wireless/wl12xx/scan.c
+++ b/drivers/net/wireless/wl12xx/scan.c
@@ -27,6 +27,7 @@
#include "cmd.h"
#include "scan.h"
#include "acx.h"
+#include "ps.h"
void wl1271_scan_complete_work(struct work_struct *work)
{
@@ -40,10 +41,11 @@
mutex_lock(&wl->mutex);
- if (wl->scan.state == WL1271_SCAN_STATE_IDLE) {
- mutex_unlock(&wl->mutex);
- return;
- }
+ if (wl->state == WL1271_STATE_OFF)
+ goto out;
+
+ if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
+ goto out;
wl->scan.state = WL1271_SCAN_STATE_IDLE;
kfree(wl->scan.scanned_ch);
@@ -52,13 +54,19 @@
ieee80211_scan_completed(wl->hw, false);
/* restore hardware connection monitoring template */
- if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
- wl1271_cmd_build_ap_probe_req(wl, wl->probereq);
+ if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) {
+ if (wl1271_ps_elp_wakeup(wl) == 0) {
+ wl1271_cmd_build_ap_probe_req(wl, wl->probereq);
+ wl1271_ps_elp_sleep(wl);
+ }
+ }
if (wl->scan.failed) {
wl1271_info("Scan completed due to error.");
ieee80211_queue_work(wl->hw, &wl->recovery_work);
}
+
+out:
mutex_unlock(&wl->mutex);
}