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authorBob Copeland <me@bobcopeland.com>2008-11-04 06:14:00 +0300
committerJohn W. Linville <linville@tuxdriver.com>2008-11-07 00:37:11 +0300
commitc793033945bea23d7a6e0d8d94b2da6603e02af2 (patch)
tree349e3f38527b10d146569c0a44d22f613effc0a6 /drivers/net/wireless/ath5k
parent0feec9dfe7b8880ab3b4c38d7cc4107dd706ea7f (diff)
downloadlinux-c793033945bea23d7a6e0d8d94b2da6603e02af2.tar.xz
ath5k: correct handling of rx status fields
ath5k_rx_status fields rs_antenna and rs_more are u8s, but we were setting them with bitwise ANDs of 32-bit values. As a consequence, jumbo frames would not be discarded as intended. Then, because the hw rate value of such frames is zero, and, since "ath5k: rates cleanup", we do not fall back to the basic rate, such packets would trigger the following WARN_ON: ------------[ cut here ]------------ WARNING: at net/mac80211/rx.c:2192 __ieee80211_rx+0x4d/0x57e [mac80211]() Modules linked in: ath5k af_packet sha256_generic aes_i586 aes_generic cbc loop i915 drm binfmt_misc acpi_cpufreq fan container nls_utf8 hfsplus dm_crypt dm_mod kvm_intel kvm fuse sbp2 snd_hda_intel snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_dummy snd_seq_oss arc4 joydev hid_apple ecb snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device usbhid appletouch mac80211 sky2 snd ehci_hcd ohci1394 bitrev crc32 sr_mod cdrom rtc sg uhci_hcd snd_page_alloc cfg80211 ieee1394 thermal ac battery processor button evdev unix [last unloaded: ath5k] Pid: 0, comm: swapper Tainted: G W 2.6.28-rc2-wl #14 Call Trace: [<c0123d1e>] warn_on_slowpath+0x41/0x5b [<c012005d>] ? sched_debug_show+0x31e/0x9c6 [<c012489f>] ? vprintk+0x369/0x389 [<c0309539>] ? _spin_unlock_irqrestore+0x54/0x58 [<c011cd8f>] ? try_to_wake_up+0x14f/0x15a [<f81918cb>] __ieee80211_rx+0x4d/0x57e [mac80211] [<f828872a>] ath5k_tasklet_rx+0x5a1/0x5e4 [ath5k] [<c013b9cd>] ? clockevents_program_event+0xd4/0xe3 [<c01283a9>] tasklet_action+0x94/0xfd [<c0127d19>] __do_softirq+0x8c/0x13e [<c0127e04>] do_softirq+0x39/0x55 [<c0128082>] irq_exit+0x46/0x85 [<c010576c>] do_IRQ+0x9a/0xb2 [<c010461c>] common_interrupt+0x28/0x30 [<f80e934a>] ? acpi_idle_enter_bm+0x2ad/0x31b [processor] [<c02976bf>] cpuidle_idle_call+0x65/0x9a [<c010262c>] cpu_idle+0x76/0xa6 [<c02fb402>] rest_init+0x62/0x64 Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath5k')
-rw-r--r--drivers/net/wireless/ath5k/desc.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/net/wireless/ath5k/desc.c b/drivers/net/wireless/ath5k/desc.c
index dd1374052ba9..5e362a7a3620 100644
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -531,10 +531,10 @@ static int ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah,
AR5K_5210_RX_DESC_STATUS0_RECEIVE_SIGNAL);
rs->rs_rate = AR5K_REG_MS(rx_status->rx_status_0,
AR5K_5210_RX_DESC_STATUS0_RECEIVE_RATE);
- rs->rs_antenna = rx_status->rx_status_0 &
- AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANTENNA;
- rs->rs_more = rx_status->rx_status_0 &
- AR5K_5210_RX_DESC_STATUS0_MORE;
+ rs->rs_antenna = AR5K_REG_MS(rx_status->rx_status_0,
+ AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANTENNA);
+ rs->rs_more = !!(rx_status->rx_status_0 &
+ AR5K_5210_RX_DESC_STATUS0_MORE);
/* TODO: this timestamp is 13 bit, later on we assume 15 bit */
rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1,
AR5K_5210_RX_DESC_STATUS1_RECEIVE_TIMESTAMP);
@@ -607,10 +607,10 @@ static int ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah,
AR5K_5212_RX_DESC_STATUS0_RECEIVE_SIGNAL);
rs->rs_rate = AR5K_REG_MS(rx_status->rx_status_0,
AR5K_5212_RX_DESC_STATUS0_RECEIVE_RATE);
- rs->rs_antenna = rx_status->rx_status_0 &
- AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA;
- rs->rs_more = rx_status->rx_status_0 &
- AR5K_5212_RX_DESC_STATUS0_MORE;
+ rs->rs_antenna = AR5K_REG_MS(rx_status->rx_status_0,
+ AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA);
+ rs->rs_more = !!(rx_status->rx_status_0 &
+ AR5K_5212_RX_DESC_STATUS0_MORE);
rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1,
AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP);
rs->rs_status = 0;