From: Hector Martin marcan@marcan.st
commit b50255c83b914defd61a57fbc81d452334b63f4c upstream.
The driver was enabling IRQs before the message processing was initialized. This could cause IRQs to come in too early and crash the driver. Instead, move the IRQ enable and hostready to a bus preinit function, at which point everything is properly initialized.
Fixes: 9e37f045d5e7 ("brcmfmac: Adding PCIe bus layer support.") Reviewed-by: Linus Walleij linus.walleij@linaro.org Reviewed-by: Arend van Spriel arend.vanspriel@broadcom.com Cc: stable@vger.kernel.org Signed-off-by: Hector Martin marcan@marcan.st Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://lore.kernel.org/r/20220131160713.245637-7-marcan@marcan.st Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c @@ -1306,6 +1306,18 @@ static void brcmf_pcie_down(struct devic { }
+static int brcmf_pcie_preinit(struct device *dev) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_pciedev *buspub = bus_if->bus_priv.pcie; + + brcmf_dbg(PCIE, "Enter\n"); + + brcmf_pcie_intr_enable(buspub->devinfo); + brcmf_pcie_hostready(buspub->devinfo); + + return 0; +}
static int brcmf_pcie_tx(struct device *dev, struct sk_buff *skb) { @@ -1414,6 +1426,7 @@ static int brcmf_pcie_reset(struct devic }
static const struct brcmf_bus_ops brcmf_pcie_bus_ops = { + .preinit = brcmf_pcie_preinit, .txdata = brcmf_pcie_tx, .stop = brcmf_pcie_down, .txctl = brcmf_pcie_tx_ctlpkt, @@ -1786,9 +1799,6 @@ static void brcmf_pcie_setup(struct devi
init_waitqueue_head(&devinfo->mbdata_resp_wait);
- brcmf_pcie_intr_enable(devinfo); - brcmf_pcie_hostready(devinfo); - ret = brcmf_attach(&devinfo->pdev->dev); if (ret) goto fail;