ath10k: defer hw setup to start/stop mac80211 hooks
This fixes suspend-to-disk. The hardware is now
re-initialized upon freeze/thaw properly.
This also makes suspend/resume re-initialize the
hardware as WoWLAN support is not done yet.
With some little work it should be possible to
support hw reconfiguration for hw/fw recovery.
HW must be initialized once before registering to
mac80211 because FW determinates what hw
capabilities can be advertised.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 0e4a704..1d4c245 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -601,6 +601,7 @@
err:
return status;
}
+EXPORT_SYMBOL(ath10k_core_start);
void ath10k_core_stop(struct ath10k *ar)
{
@@ -608,18 +609,49 @@
ath10k_htt_detach(&ar->htt);
ath10k_wmi_detach(ar);
}
+EXPORT_SYMBOL(ath10k_core_stop);
+
+/* mac80211 manages fw/hw initialization through start/stop hooks. However in
+ * order to know what hw capabilities should be advertised to mac80211 it is
+ * necessary to load the firmware (and tear it down immediately since start
+ * hook will try to init it again) before registering */
+static int ath10k_core_probe_fw(struct ath10k *ar)
+{
+ int ret;
+
+ ret = ath10k_hif_power_up(ar);
+ if (ret) {
+ ath10k_err("could not start pci hif (%d)\n", ret);
+ return ret;
+ }
+
+ ret = ath10k_core_start(ar);
+ if (ret) {
+ ath10k_err("could not init core (%d)\n", ret);
+ ath10k_hif_power_down(ar);
+ return ret;
+ }
+
+ ath10k_core_stop(ar);
+ ath10k_hif_power_down(ar);
+ return 0;
+}
int ath10k_core_register(struct ath10k *ar)
{
int status;
- status = ath10k_core_start(ar);
- if (status)
- goto err;
+ status = ath10k_core_probe_fw(ar);
+ if (status) {
+ ath10k_err("could not probe fw (%d)\n", status);
+ return status;
+ }
status = ath10k_mac_register(ar);
- if (status)
- goto err_core_stop;
+ if (status) {
+ ath10k_err("could not register to mac80211 (%d)\n", status);
+ return status;
+ }
status = ath10k_debug_create(ar);
if (status) {
@@ -631,9 +663,6 @@
err_unregister_mac:
ath10k_mac_unregister(ar);
-err_core_stop:
- ath10k_core_stop(ar);
-err:
return status;
}
EXPORT_SYMBOL(ath10k_core_register);
@@ -644,7 +673,6 @@
* Otherwise we will fail to submit commands to FW and mac80211 will be
* unhappy about callback failures. */
ath10k_mac_unregister(ar);
- ath10k_core_stop(ar);
}
EXPORT_SYMBOL(ath10k_core_unregister);