brcmfmac: dump dongle memory when attaching failed

To enhance FW debugging, we add dongle memory dump when hitting attaching
failure with PCIE bus. It can help developer to get more information
about dongle trap reason and root cause.
Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Ian Lin <ian.lin@infineon.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220929031001.9962-4-ian.lin@infineon.com

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -1399,7 +1399,8 @@ void brcmf_fw_crashed(struct device *dev)
 
 	brcmf_dev_coredump(dev);
 
-	schedule_work(&drvr->bus_reset);
+	if (drvr->bus_reset.func)
+		schedule_work(&drvr->bus_reset);
 }
 
 void brcmf_detach(struct device *dev)

drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c

@@ -2068,13 +2068,14 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
 	struct brcmf_commonring **flowrings;
 	u32 i, nvram_len;
 
+	bus = dev_get_drvdata(dev);
+	pcie_bus_dev = bus->bus_priv.pcie;
+	devinfo = pcie_bus_dev->devinfo;
+
 	/* check firmware loading result */
 	if (ret)
 		goto fail;
 
-	bus = dev_get_drvdata(dev);
-	pcie_bus_dev = bus->bus_priv.pcie;
-	devinfo = pcie_bus_dev->devinfo;
 	brcmf_pcie_attach(devinfo);
 
 	fw = fwreq->items[BRCMF_PCIE_FW_CODE].binary;
@@ -2148,6 +2149,9 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
 	return;
 
 fail:
+	brcmf_err(bus, "Dongle setup failed\n");
+	brcmf_pcie_bus_console_read(devinfo, true);
+	brcmf_fw_crashed(dev);
 	device_release_driver(dev);
 }