wireless: hostap, fix oops due to early probing interrupt
authorColin Ian King <colin.king@canonical.com>
Mon, 31 Aug 2009 02:18:41 +0000 (20:18 -0600)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 21 Dec 2009 23:38:49 +0000 (18:38 -0500)
commit15920d8afc87861672e16fa95ae2764b065d6dd3
treef7432ca674715d5033f107018e9734e66ea2d2dc
parent254416aae70ab2e6b57fd79782c8a67196234d02
wireless: hostap, fix oops due to early probing interrupt

BugLink: https://bugs.launchpad.net/ubuntu/+bug/254837
Spurious shared interrupts or early probing interrupts can cause the
hostap interrupt handler to oops before the driver has fully configured
the IO base port addresses. In some cases the oops can be because
the hardware shares an interrupt line, on other cases it is due to a
race condition between probing for the hardware and configuring
the IO base port. The latter occurs because the probing is required to
determin the hardware port address which is only determined when the probe
can interrupt the hardware (catch 22).

This patch catches this pre-configured condition to avoid the oops.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/hostap/hostap_hw.c