brcmfmac: wait for driver to go idle during suspend
Before going in suspend state the watchdog thread needs to put the
device in bus sleep state, which assures it can go in deep-sleep
state during D3 state.
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
index 8ba60f6..9afaeb6 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
@@ -1045,7 +1045,9 @@
bus_if->wowl_supported = true;
#endif
+ sdiodev->sleeping = false;
atomic_set(&sdiodev->suspend, false);
+ init_waitqueue_head(&sdiodev->idle_wait);
brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
err = brcmf_sdiod_probe(sdiodev);
@@ -1107,12 +1109,23 @@
#ifdef CONFIG_PM_SLEEP
static int brcmf_ops_sdio_suspend(struct device *dev)
{
- struct brcmf_bus *bus_if = dev_get_drvdata(dev);
- struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
+ struct brcmf_bus *bus_if;
+ struct brcmf_sdio_dev *sdiodev;
mmc_pm_flag_t sdio_flags;
brcmf_dbg(SDIO, "Enter\n");
+ bus_if = dev_get_drvdata(dev);
+ sdiodev = bus_if->bus_priv.sdio;
+
+ /* wait for watchdog to go idle */
+ if (wait_event_timeout(sdiodev->idle_wait, sdiodev->sleeping,
+ msecs_to_jiffies(3 * BRCMF_WD_POLL_MS)) == 0) {
+ brcmf_err("bus still active\n");
+ return -EBUSY;
+ }
+ /* disable watchdog */
+ brcmf_sdio_wd_timer(sdiodev->bus, 0);
atomic_set(&sdiodev->suspend, true);
if (sdiodev->wowl_enabled) {
@@ -1124,9 +1137,6 @@
if (sdio_set_host_pm_flags(sdiodev->func[1], sdio_flags))
brcmf_err("Failed to set pm_flags %x\n", sdio_flags);
}
-
- brcmf_sdio_wd_timer(sdiodev->bus, 0);
-
return 0;
}