On 08/09/2013 12:36 PM, John W. Linville wrote:
From: "John W. Linville" <linville@xxxxxxxxxxxxx> The driver fails to check the results of DMA mapping in twp places, which results in the following warning: [ 28.078515] ------------[ cut here ]------------ [ 28.078529] WARNING: at lib/dma-debug.c:937 check_unmap+0x47e/0x930() [ 28.078533] bcma-pci-bridge 0000:0e:00.0: DMA-API: device driver failed to check map error[device address=0x00000000b5d60d6c] [size=1876 bytes] [mapped as single] [ 28.078536] Modules linked in: bnep bluetooth vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 b43 brcmsmac rtl8192cu rtl8192c_common rtlwifi mac802 11 brcmutil cfg80211 snd_hda_codec_conexant rng_core snd_hda_intel kvm_amd snd_hda_codec ssb kvm mmc_core snd_pcm snd_seq snd_timer snd_seq_device snd k8temp cordic joydev serio_raw hwmon sr_mod sg pcmcia pcmcia_core soundcore cdrom i2c_nforce2 i2c_core forcedeth bcma snd_page_alloc autofs4 ext4 jbd2 mbcache crc1 6 scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_amd [ 28.078602] CPU: 1 PID: 2570 Comm: NetworkManager Tainted: G O 3.10.0-rc7-wl+ #42 [ 28.078605] Hardware name: Hewlett-Packard HP Pavilion dv2700 Notebook PC/30D6, BIOS F.27 11/27/2008 [ 28.078607] 0000000000000009 ffff8800bbb03ad8 ffffffff8144f898 ffff8800bbb03b18 [ 28.078612] ffffffff8103e1eb 0000000000000002 ffff8800b719f480 ffff8800b7b9c010 [ 28.078617] ffffffff824204c0 ffffffff81754d57 0000000000000754 ffff8800bbb03b78 [ 28.078622] Call Trace: [ 28.078624] <IRQ> [<ffffffff8144f898>] dump_stack+0x19/0x1b [ 28.078634] [<ffffffff8103e1eb>] warn_slowpath_common+0x6b/0xa0 [ 28.078638] [<ffffffff8103e2c1>] warn_slowpath_fmt+0x41/0x50 [ 28.078650] [<ffffffff8122d7ae>] check_unmap+0x47e/0x930 [ 28.078655] [<ffffffff8122de4c>] debug_dma_unmap_page+0x5c/0x70 [ 28.078679] [<ffffffffa04a808c>] dma64_getnextrxp+0x10c/0x190 [brcmsmac] [ 28.078691] [<ffffffffa04a9042>] dma_rx+0x62/0x240 [brcmsmac] [ 28.078707] [<ffffffffa0479101>] brcms_c_dpc+0x211/0x9d0 [brcmsmac] [ 28.078717] [<ffffffffa046d927>] ? brcms_dpc+0x27/0xf0 [brcmsmac] [ 28.078731] [<ffffffffa046d947>] brcms_dpc+0x47/0xf0 [brcmsmac] [ 28.078736] [<ffffffff81047dcc>] tasklet_action+0x6c/0xf0 --snip-- [ 28.078974] [<ffffffff813891bd>] SyS_sendmsg+0xd/0x20 [ 28.078979] [<ffffffff81455c24>] tracesys+0xdd/0xe2 [ 28.078982] ---[ end trace 6164d1a08148e9c8 ]--- [ 28.078984] Mapped at: [ 28.078985] [<ffffffff8122c8fd>] debug_dma_map_page+0x9d/0x150 [ 28.078989] [<ffffffffa04a9322>] dma_rxfill+0x102/0x3d0 [brcmsmac] [ 28.079001] [<ffffffffa047a13d>] brcms_c_init+0x87d/0x1100 [brcmsmac] [ 28.079010] [<ffffffffa046d851>] brcms_init+0x21/0x30 [brcmsmac] [ 28.079018] [<ffffffffa04786e0>] brcms_c_up+0x150/0x430 [brcmsmac] As the patch adds a new failure mechanism to dma_rxfill(). When I changed the comment at the start of the routine to add that information, I also polished the wording. Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx> Cc: Stable <stable@xxxxxxxxxxxxxxx> Cc: Brett Rudley <brudley@xxxxxxxxxxxx> Cc: Arend van Spriel <arend@xxxxxxxxxxxx> Cc: Franky (Zhenhui) Lin <frankyl@xxxxxxxxxxxx> Cc: Hante Meuleman <meuleman@xxxxxxxxxxxx> Cc: brcm80211-dev-list@xxxxxxxxxxxx Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> --- Did this one get lost? V2 - fixed two patch errors. V3 - address comments from Arend (linville)
For some reason, I never got the mail containing Arend's comments, and I forgot about it. If John's V3 fixes take care of them, then it should be pushed.
Larry -- 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
