From 0e8edb9aed03892844713bb76a8e1d2d138f3175 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 13 Jan 2017 16:35:03 +0100 Subject: [PATCH] mwifiex: fix uninitialized variable access in pcie_remove Checking the firmware status from PCIe register only works if the register is available, otherwise we end up with random behavior: drivers/net/wireless/marvell/mwifiex/pcie.c: In function 'mwifiex_pcie_remove': drivers/net/wireless/marvell/mwifiex/pcie.c:585:5: error: 'fw_status' may be used uninitialized in this function [-Werror=maybe-uninitialized] This makes sure we treat the absence of the register as a failure. Fixes: 045f0c1b5e26 ("mwifiex: get rid of global user_rmmod flag") Signed-off-by: Arnd Bergmann Signed-off-by: Kalle Valo --- drivers/net/wireless/marvell/mwifiex/pcie.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index 66226c615be0..4d78087ea13a 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -299,6 +299,8 @@ static void mwifiex_pcie_remove(struct pci_dev *pdev) reg = card->pcie.reg; if (reg) ret = mwifiex_read_reg(adapter, reg->fw_status, &fw_status); + else + fw_status = -1; if (fw_status == FIRMWARE_READY_PCIE && !adapter->mfg_mode) { mwifiex_deauthenticate_all(adapter); -- 2.20.1