brcmfmac: on sdio remove first detach bus then stop worker.

Currently the function sdio_remove will first destroy the datawork
workqueue and then detach the bus. This can create the situation
where work gets added on non-existing work queue resulting in panic.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index be2ec8a..0981854 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -4205,14 +4205,14 @@ void brcmf_sdio_remove(struct brcmf_sdio *bus)
                /* De-register interrupt handler */
                brcmf_sdiod_intr_unregister(bus->sdiodev);
 
-               cancel_work_sync(&bus->datawork);
-               if (bus->brcmf_wq)
-                       destroy_workqueue(bus->brcmf_wq);
-
                if (bus->sdiodev->bus_if->drvr) {
                        brcmf_detach(bus->sdiodev->dev);
                }
 
+               cancel_work_sync(&bus->datawork);
+               if (bus->brcmf_wq)
+                       destroy_workqueue(bus->brcmf_wq);
+
                if (bus->ci) {
                        if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
                                sdio_claim_host(bus->sdiodev->func[1]);