@@ -684,11 +684,17 @@ static int w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
brcmf_dbg(TRACE, "Enter: on=%d\n", on);
wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
+
+ /* Cannot re-tune if device is asleep */
+ if (on)
+ sdio_retune_hold_now(bus->sdiodev->func[1]);
+
/* 1st KSO write goes to AOS wake up core if device is asleep */
brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
wr_val, &err);
if (on) {
+ sdio_retune_release(bus->sdiodev->func[1]);
/* device WAKEUP through KSO:
* write bit 0 & read back until
* both bits 0 (kso bit) & 1 (dev on status) are set
If the device is in a custom sleep state, then re-tuning will fail. Add calls to sdio_retune_hold_now() and sdio_retune_release() to prevent re-tuning before the wake-up command. In the case re-tuning was needed, the wake-up command might return an error, but the wake-up is expected still to have happened, and the error is anyway ignored. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 6 ++++++ 1 file changed, 6 insertions(+)