ath9k: Fix panic on driver load

The device has to be marked as invalid before
registering the ISR. HW initialization takes place
after the ISR has been registered, and the invalid
flag is eventually cleared in the ->stop() callback.

Reported-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ahb.c b/drivers/net/wireless/ath/ath9k/ahb.c
index f24b1f4c3e29..9e62a569e816 100644
--- a/drivers/net/wireless/ath/ath9k/ahb.c
+++ b/drivers/net/wireless/ath/ath9k/ahb.c
@@ -121,6 +121,9 @@ static int ath_ahb_probe(struct platform_device *pdev)
         sc->mem = mem;
         sc->irq = irq;
 
+        /* Will be cleared in ath9k_start() */
+        sc->sc_flags |= SC_OP_INVALID;
+
         ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
         if (ret) {
                 dev_err(&pdev->dev, "request_irq failed\n");
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 16d1efb4b8b2..5f78d7a5ff22 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -534,8 +534,6 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
         int ret = 0, i;
         int csz = 0;
 
-        sc->sc_flags |= SC_OP_INVALID;
-
         ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
         if (!ah)
                 return -ENOMEM;
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 95b9a07597ef..4ae7b5f12029 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -198,6 +198,9 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         sc->dev = &pdev->dev;
         sc->mem = mem;
 
+        /* Will be cleared in ath9k_start() */
+        sc->sc_flags |= SC_OP_INVALID;
+
         ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
         if (ret) {
                 dev_err(&pdev->dev, "request_irq failed\n");