rt2x00: Fix WPA TKIP Michael MIC failures.

As reported and found by Johannes Stezenbach:
rt2800{pci,usb} do not report the Michael MIC in RXed frames, but do check
the Michael MIC in hardware. Therefore we have to report to mac80211 that the
received frame does not include the Michael MIC.

https://bugzilla.kernel.org/show_bug.cgi?id=16608

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index 7951cdaa9c01..3b3f1e45ab3e 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -652,6 +652,12 @@ static void rt2800pci_fill_rxdone(struct queue_entry *entry,
                  */
                 rxdesc->flags |= RX_FLAG_IV_STRIPPED;
 
+                /*
+                 * The hardware has already checked the Michael Mic and has
+                 * stripped it from the frame. Signal this to mac80211.
+                 */
+                rxdesc->flags |= RX_FLAG_MMIC_STRIPPED;
+
                 if (rxdesc->cipher_status == RX_CRYPTO_SUCCESS)
                         rxdesc->flags |= RX_FLAG_DECRYPTED;
                 else if (rxdesc->cipher_status == RX_CRYPTO_FAIL_MIC)
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index b97a4a54ff4c..197a36c05fda 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -486,6 +486,12 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
                  */
                 rxdesc->flags |= RX_FLAG_IV_STRIPPED;
 
+                /*
+                 * The hardware has already checked the Michael Mic and has
+                 * stripped it from the frame. Signal this to mac80211.
+                 */
+                rxdesc->flags |= RX_FLAG_MMIC_STRIPPED;
+
                 if (rxdesc->cipher_status == RX_CRYPTO_SUCCESS)
                         rxdesc->flags |= RX_FLAG_DECRYPTED;
                 else if (rxdesc->cipher_status == RX_CRYPTO_FAIL_MIC)