• Ivo van Doorn's avatar
    rt2x00: Fix race condition when using inderect registers · 8ff48a8b
    Ivo van Doorn authored
    Indirect registers require multiple calls to the CSR
    register in order to access the indirect registers.
    This must be protected under a lock to prevent race
    conditions which could cause invalid data to
    be returned when reading from the indirect register or silent
    failures when writing data to the indirect register.
    USB drivers where already protected under a mutex,
    so rename the mutex and make PCI drivers use the mutex
    as well.
    This now means that BBP and RF registers are no longer
    accessible in interrupt context. That is not a bad
    situation since the slow behavior of accessing
    those registers means we don't _want_ to access them
    in interrupt context either.
    Signed-off-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
rt2x00dev.c 32.1 KB