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@xxxxxxxxxxxxx> --- drivers/net/wireless/ipw2x00/ipw2100.c | 8 -------- 1 files changed, 0 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c index 1189dbb..996e9d7 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, -- 1.7.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
