p54pci: fix bugs in p54p_check_tx_ring

commit 0250ececdf6813457c98719e2d33b3684881fde0 upstream.

Hans de Goede identified a bug in p54p_check_tx_ring:

there are two ring indices. 1 => tx data and 3 => tx management.
But the old code had a constant "1" and this resulted in spurious
dma unmapping failures.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=583623
Bug-Identified-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/wireless/p54/p54pci.c b/drivers/net/wireless/p54/p54pci.c
index 4bf4c213baec13c5133e0a4a08f0254c87b72d5b..41d33cde97c0f1584da844b60984ac3e89fcdac7 100644 (file)
--- a/drivers/net/wireless/p54/p54pci.c
+++ b/drivers/net/wireless/p54/p54pci.c
@@ -245,7 +245,7 @@ static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
        u32 idx, i;
 
        i = (*index) % ring_limit;
-       (*index) = idx = le32_to_cpu(ring_control->device_idx[1]);
+       (*index) = idx = le32_to_cpu(ring_control->device_idx[ring_index]);
        idx %= ring_limit;
 
        while (i != idx) {