On Sat, 2012-11-03 at 19:40 -0600, Shuah Khan wrote: > Add missing dma_mapping_error() checks to validate dma addresses returned by > dma_map_page() calls to avoid the following warning: > > [ 28.475686] WARNING: at lib/dma-debug.c:933 check_unmap+0x459/0x8a0() > [ 28.475688] Hardware name: HP EliteBook 6930p > [ 28.475690] iwlwifi 0000:03:00.0: DMA-API: device driver failed to check > map error[device address=0x00000000ffffa000] [size=8192 bytes] [mapped as > page] > [ 28.475691] Modules linked in: arc4 bnep rfcomm iwldvm mac80211 > snd_hda_codec_analog radeon snd_hda_intel snd_hda_codec coretemp kvm_intel > snd_hwdep snd_pcm iwlwifi kvm btusb bluetooth snd_seq_midi snd_rawmidi ttm > cfg80211 snd_seq_midi_event drm_kms_helper pata_pcmcia drm snd_seq > binfmt_misc pcmcia snd_timer snd_seq_device tpm_infineon snd dm_multipath > yenta_socket joydev pcmcia_rsrc pcmcia_core hp_wmi psmouse hp_accel microcode > soundcore i2c_algo_bit sparse_keymap wmi ppdev lpc_ich lis3lv02d > snd_page_alloc video tpm_tis serio_raw parport_pc input_polldev mac_hid lp > parport firewire_ohci firewire_core crc_itu_t sdhci_pci sdhci e1000e
Thanks for the report. Since I think doing BUG_ON() in such a scenario is a really bad idea, I've applied a different patch with your Reported-by. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
