mwifiex: skip firmware dump when read_regs() fails

If we are not able to read registers or PCIe memory,
it means PCIe device is in bad state. We will skip
firmware dump in this case.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/pcie.c

@@ -2366,9 +2366,13 @@ mwifiex_pcie_rdwr_firmware(struct mwifiex_adapter *adapter, u8 doneflag)
 {
 	int ret, tries;
 	u8 ctrl_data;
+	u32 fw_status;
 	struct pcie_service_card *card = adapter->card;
 	const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
 
+	if (mwifiex_read_reg(adapter, reg->fw_status, &fw_status))
+		return RDWR_STATUS_FAILURE;
+
 	ret = mwifiex_write_reg(adapter, reg->fw_dump_ctrl, FW_DUMP_HOST_READY);
 	if (ret) {
 		mwifiex_dbg(adapter, ERROR,