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authorJohn W. Linville <linville@tuxdriver.com>2010-08-13 18:47:33 -0400
committerJohn W. Linville <linville@tuxdriver.com>2010-08-17 14:38:14 -0400
commitc206a04fba2c3890bc95dc9c20ae2cf9740fae71 (patch)
tree036171ac2be1fb884b115418808c0ccdb5d61f32 /drivers/net/wireless/ipw2x00
parent3198c68cb4e1967f59244f0a0b9f46102d617373 (diff)
ipw2100: don't sync status queue entries
These are allocated with pci_alloc_consistent, so calling pci_dma_sync_single_for_cpu is incorrect usage of the API. Remove this misuse and consequently avoid the following backtrace: WARNING: at lib/dma-debug.c:902 check_sync+0xce/0x43a() Hardware name: 2373HU6 ipw2100 0000:02:02.0: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x0000000034e88008] [size=8 bytes] Modules linked in: microcode ipw2100(+) snd_seq_device ppdev libipw nsc_ircc snd_pcm lib80211 video output irda parport_pc cfg80211 parport thinkpad_acpi e1000 iTCO_wdt crc_ccitt snd_timer iTCO_vendor_support snd i2c_i801 pcspkr rfkill soundcore joydev snd_page_alloc yenta_socket radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan] Pid: 0, comm: swapper Tainted: G W 2.6.35-wl+ #8 Call Trace: [<c043aa42>] warn_slowpath_common+0x6a/0x7f [<c05d252a>] ? check_sync+0xce/0x43a [<c043aaca>] warn_slowpath_fmt+0x2b/0x2f [<c05d252a>] check_sync+0xce/0x43a [<c046189a>] ? print_lock_contention_bug+0x11/0xb2 [<c05d2b6f>] debug_dma_sync_single_for_cpu+0x47/0x49 [<c06cbd3c>] ? ehci_irq+0x31/0x331 [<f82a224a>] ? ipw2100_irq_tasklet+0x24/0x5e9 [ipw2100] [<f82a224a>] ? ipw2100_irq_tasklet+0x24/0x5e9 [ipw2100] [<f82a221d>] pci_dma_sync_single_for_cpu.clone.1+0x42/0x4b [ipw2100] [<f82a23a2>] ipw2100_irq_tasklet+0x17c/0x5e9 [ipw2100] [<c043fd87>] tasklet_action+0x78/0xcb [<c0440293>] __do_softirq+0xc4/0x183 [<c044038d>] do_softirq+0x3b/0x5f [<c04404d0>] irq_exit+0x3a/0x6d [<c0404423>] do_IRQ+0x8b/0x9f [<c04038b5>] common_interrupt+0x35/0x3c [<c062ecfa>] ? acpi_idle_enter_simple+0xfe/0x13c [<c045007b>] ? exit_itimers+0x2d/0x73 [<c062ecfc>] ? acpi_idle_enter_simple+0x100/0x13c [<c070bf10>] cpuidle_idle_call+0x78/0xdc [<c040251c>] cpu_idle+0x9b/0xb7 [<c07b1dd2>] rest_init+0xa6/0xab [<c0a4b96d>] start_kernel+0x389/0x38e [<c0a4b0c9>] i386_start_kernel+0xc9/0xd0 Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ipw2x00')
-rw-r--r--drivers/net/wireless/ipw2x00/ipw2100.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index 1189dbb6e2a6..996e9d7d7586 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -2723,14 +2723,6 @@ static void __ipw2100_rx_process(struct ipw2100_priv *priv)
packet = &priv->rx_buffers[i];
- /* Sync the DMA for the STATUS buffer so CPU is sure to get
- * the correct values */
- pci_dma_sync_single_for_cpu(priv->pci_dev,
- sq->nic +
- sizeof(struct ipw2100_status) * i,
- sizeof(struct ipw2100_status),
- PCI_DMA_FROMDEVICE);
-
/* Sync the DMA for the RX buffer so CPU is sure to get
* the correct values */
pci_dma_sync_single_for_cpu(priv->pci_dev, packet->dma_addr,

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