1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index 8783022db11e..d579df72b783 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -34,6 +34,13 @@ bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
                       & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
                         return 1;
         } else {
+                /* To prevent CPU fault on PPC, do not read a register
+                 * unless the interface is started; however, on resume
+                 * for hibernation, this routine is entered early. When
+                 * that happens, unconditionally return TRUE.
+                 */
+                if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
+                        return 1;
                 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
                     & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
                         return 1;