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authorJouni Malinen <jouni.malinen@atheros.com>2009-06-16 11:59:23 +0300
committerJohn W. Linville <linville@tuxdriver.com>2009-06-19 11:50:17 -0400
commitf0214843ba23d9bf6dc6b8ad2c6ee27b60f0322e (patch)
tree30bfe0824da9cda7711bd589fce6fa81406906e0 /net/rfkill
parentf72151fb6820e90ce12a15e2768aa41150c5186d (diff)
ath9k: Fix PCI FATAL interrupts by restoring RETRY_TIMEOUT disabling
An earlier commit, 'ath9k: remove dummy PCI "retry timeout" fix', removed code that was documented to disable RETRY_TIMEOUT register (PCI reg 0x41) since it was claimed to be a no-op. However, it turns out that there are some combinations of hosts and ath9k-supported cards for which this is not a no-op (reg 0x41 has value 0x80, not 0) and this code (or something similar) is needed. In such cases, the driver may be next to unusable due to very frequent PCI FATAL interrupts from the card. Reverting the earlier commit, i.e., restoring the RETRY_TIMEOUT disabling, seems to resolve the issue. Since the removal of this code was not based on any known issue and was purely a cleanup change, the safest option here is to just revert that commit. Should there be desire to clean this up in the future, the change will need to be tested with a more complete coverage of cards and host systems. http://bugzilla.kernel.org/show_bug.cgi?id=13483 Cc: stable@kernel.org Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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