• Avinash Patil's avatar
    mwifiex: fix system freeze while reloading driver · 48f4d916
    Avinash Patil authored
    Unload sequence for mwifiex PCIE driver is as follows:
    1. Invoking cleanup module from kernel results into
    2. Kernel invokes PCIE remove() handler which disconnects all
    3. One step during disconnect is to clean PCIE TX rings.
       During this we read txbd_rdptr from FW.
    While loading driver next time, we see pci_enable_device()
    results into system freeze. This may have happened because we
    accessed PCI device after unregistering from bus driver.
    Removing this ioread() operation resolves this bug.
    Signed-off-by: default avatarAvinash Patil <patila@marvell.com>
    Signed-off-by: default avatarBing Zhao <bzhao@marvell.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
pcie.c 63.7 KB