Comment 4 for bug 407040

Tried that and it is now worse. The machine now noticeably pauses each time there is a DMA failure.

[ 245.190471] ath9k: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 0x00000000
[ 245.190475] ath9k: Chip reset failed
[ 245.190476] ath9k: Unable to reset channel (2457 Mhz) reset status -22
[ 245.190480] ath9k: Unable to set channel
[ 245.379304] ath9k: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 0x00000000
[ 245.379318] ath9k: Chip reset failed
[ 245.379323] ath9k: Unable to reset hardware; reset status -22
[ 245.390319] ath9k: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff
[ 245.500379] ath9k: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 0x00000000
[ 245.608631] ath9k: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 0x00000000
[ 245.649520] ath9k 0000:06:00.0: PCI INT A disabled
[ 245.649597] ath9k: Driver unloaded
[ 258.115308] ath9k 0000:06:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 258.225773] ath9k: timeout (100000 us) on reg 0x7044: 0xffffffff & 0x0000000f != 0x00000002
[ 258.225783] ath9k: Couldn't reset chip
[ 258.225795] ath9k: Unable to attach hardware; HAL status -5
[ 258.226861] ath9k 0000:06:00.0: PCI INT A disabled