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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id x3sm3727737qta.53.2020.09.06.13.05.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Sep 2020 13:05:54 -0700 (PDT) From: trix@redhat.com To: amitkarwar@gmail.com, ganapathi.bhat@nxp.com, huxinming820@gmail.com, kvalo@codeaurora.org, davem@davemloft.net, kuba@kernel.org, natechancellor@gmail.com, ndesaulniers@google.com, bzhao@marvell.com, dkiran@marvell.com, frankh@marvell.com, linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Tom Rix Subject: [PATCH] mwifiex: remove function pointer check Date: Sun, 6 Sep 2020 13:05:48 -0700 Message-Id: <20200906200548.18053-1-trix@redhat.com> X-Mailer: git-send-email 2.18.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Tom Rix 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 Reviewed-by: Nathan Chancellor --- drivers/net/wireless/marvell/mwifiex/init.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c index 82d69bc3aaaf..f006a3d72b40 100644 --- 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 */