[PATCH 1/4] wifi: brcmfmac: pcie: set the state before D0_INFORM on resume

[Andre Eikmeyer <dev@deq.rocks>]

With the mailbox on the control ring, D0_INFORM goes through the ring
write path, which refuses to write while devinfo->state is DOWN.
brcmf_pcie_pm_leave_D3() sets the state only after D0_INFORM, so every
hot resume fails and falls back to remove and re-probe:

  brcmf_pcie_send_mb_data: Failed to send H2D mailbox data (-5)

Set the state before D0_INFORM and back to DOWN when the hot resume
fails.

Signed-off-by: Andre Eikmeyer <dev@deq.rocks>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 4de157d18ff..231a2fb89f0 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -2838,10 +2838,10 @@ static int brcmf_pcie_pm_leave_D3(struct device *dev)
 	/* Check if device is still up and running, if so we are ready */
 	if (brcmf_pcie_read_pcie32(devinfo, devinfo->reginfo->intmask) != 0) {
 		brcmf_dbg(PCIE, "Try to wakeup device....\n");
+		devinfo->state = BRCMFMAC_PCIE_STATE_UP;
 		if (brcmf_pcie_send_mb_data(devinfo, BRCMF_H2D_HOST_D0_INFORM))
 			goto cleanup;
 		brcmf_dbg(PCIE, "Hot resume, continue....\n");
-		devinfo->state = BRCMFMAC_PCIE_STATE_UP;
 		brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
 		brcmf_bus_change_state(bus, BRCMF_BUS_UP);
 		brcmf_pcie_intr_enable(devinfo);
@@ -2851,6 +2851,7 @@ static int brcmf_pcie_pm_leave_D3(struct device *dev)
 	}
 
 cleanup:
+	devinfo->state = BRCMFMAC_PCIE_STATE_DOWN;
 	brcmf_chip_detach(devinfo->ci);
 	devinfo->ci = NULL;
 	pdev = devinfo->pdev;