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  1. 15 2月, 2016 2 次提交
    • E
      iwlwifi: pcie: fix RF-Kill vs. firmware load race · a6bd005f
      由 Emmanuel Grumbach 提交于 
      When we load the firmware, we hold trans_pcie->mutex to
avoid nested flows. We also rely on the ISR to wake up the
thread when the DMA has finished copying a chunk. During
this flow, we enable the RF-Kill interrupt.

The problem is that the RF-Kill interrupt handler can take
the mutex and bring the device down. This means that if
we load the firmware while the RF-Kill switch is enabled
(which will happen when we load the INIT firmware to read
the device's capabilities and register to mac80211), we
may get an RF-Kill interrupt immediately and the ISR will
be waiting for the mutex held by the thread that is
currently loading the firmware. At this stage, the ISR
won't be able to service the DMA's interrupt needed to
wake up the thread that load the firmware. We are in a
deadlock situation which ends when the thread that loads
the firmware fails on timeout and releases the mutex.

To fix this, take the mutex later in the flow, disable
the interrupts and synchronize_irq() to give a chance to
the RF-Kill interrupt to run and complete.
After that, mask all the interrupts besides the DMA
interrupt and proceed with firmware load. Make sure to
check that there was no RF-Kill interrupt when the
interrupts were disabled.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=111361Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      a6bd005f
    • L
      iwlwifi: mvm: don't allow sched scans without matches to be started · 5e56276e
      由 Luca Coelho 提交于 
      The firmware can perform a scheduled scan with not matchsets passed,
but it can't send notification that results were found.  Since the
userspace then cannot know when we got new results and the firmware
wouldn't trigger a wake in case we are sleeping, it's better not to
allow scans without matchsets.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=110831

Cc: <stable@vger.kernel.org> [3.17+]
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      5e56276e
  3. 11 2月, 2016 1 次提交
  5. 31 1月, 2016 1 次提交
  7. 26 1月, 2016 2 次提交
    • G
      iwlwifi: mvm: rs: fix TPC statistics handling · 69c7fda4
      由 Gregory Greenman 提交于 
      FW behaviour changed and now updates driver about the used TPC
reduction in the following cases:
1. In tx response, which is used mostly for a single frame case
2. In BA notification

When tx aggregation fails with the initial rate, FW will send
to the driver BA notification and will try to transmit with the
next rate, but this time without tx power reduction. Thus, in case
of a failure with the initial rate, driver will get two BA notifications,
the first one with reduced tx power as in the LQ command and the second
one with 0 power reduction.

This patch adapts the TPC statistics according to the description above:
1. Use BA notifications instead of Tx response
2. For TPC only, drop the optimization which considers empty BA as one
MPDU. The reason is that with TPC we want to recover very quickly from
a bad power reduction and, therefore we'd like the success ratio to get
an immediate hit when failing to get a BA, so we'd switch back to a
lower or zero power reduction
Signed-off-by: NGregory Greenman <gregory.greenman@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      69c7fda4
    • O
      iwlwifi: update support for 3168 series firmware and NVM · ca296c57
      由 Oren Givon 提交于 
      Update the struct which defines the support for 3168 cards.
Now it will search for a firmware of this format:
iwlwifi-3168-XX.ucode
Also, set the minimum version of the ucode to 20.
Update the minimum NVM version and minimum NVM calibrations
version of the 3168 series.
Signed-off-by: NOren Givon <oren.givon@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      ca296c57
  9. 25 1月, 2016 2 次提交
  11. 08 1月, 2016 21 次提交
  13. 07 1月, 2016 2 次提交
  15. 22 12月, 2015 1 次提交
  17. 21 12月, 2015 8 次提交