mwifiex: remove function pointer check

clang static analyzer reports this problem

init.c:739:8: warning: Called function pointer
  is null (null dereference)
        ret = adapter->if_ops.check_fw_status( ...
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In mwifiex_dnld_fw, there is an earlier check for check_fw_status(),
The check was introduced for usb support at the same time this
check in _mwifiex_fw_dpc() was made

	if (adapter->if_ops.dnld_fw) {
		ret = adapter->if_ops.dnld_fw(adapter, &fw);
	} else {
		ret = mwifiex_dnld_fw(adapter, &fw);
	}

And a dnld_fw function initialized as part the usb's
mwifiex_if_ops.

The other instances of mwifiex_if_ops for pci and sdio
both set check_fw_status.

So the first check is not needed and can be removed.

Fixes: 4daffe354366 ("mwifiex: add support for Marvell USB8797 chipset")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200906200548.18053-1-trix@redhat.com

diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c
index 82d69bc..f006a3d 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/init.c
+++ b/drivers/net/wireless/marvell/mwifiex/init.c
@@ -695,14 +695,12 @@ int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
        int ret;
        u32 poll_num = 1;
 
-       if (adapter->if_ops.check_fw_status) {
-               /* check if firmware is already running */
-               ret = adapter->if_ops.check_fw_status(adapter, poll_num);
-               if (!ret) {
-                       mwifiex_dbg(adapter, MSG,
-                                   "WLAN FW already running! Skip FW dnld\n");
-                       return 0;
-               }
+       /* check if firmware is already running */
+       ret = adapter->if_ops.check_fw_status(adapter, poll_num);
+       if (!ret) {
+               mwifiex_dbg(adapter, MSG,
+                           "WLAN FW already running! Skip FW dnld\n");
+               return 0;
        }
 
        /* check if we are the winner for downloading FW */