On Wed, Dec 11, 2013 at 10:33 AM, Emmanuel Grumbach
<emmanuel.grumbach@xxxxxxxxx> wrote:
> RT folks have raised issues with iwlwifi wrt. RT kernel some time
> ago. Johannes had a few patches to address this, but I had a few
> concerns with them. This series tries to address the RT concerns:
> * we don't do anything in hard-irq context besides stopping the
> interrupts in the device.
> * the interrupt cause is read from the irq handler and is handled
> there.
>
Well - this was a bit unfair :)
The code I get is probably very similar (and inspired) from Johannes's
work. But I guess I was missing:
iwlwifi: pcie: track interrupt mask in SW.
> This allows us to avoid the usage of _irqsave all over the driver
> and also avoids any kind of locks in the hard-irq context.
> We still have some work to do with the locks in the handler.
> I believe the locking model can be improved there.
>
> This patch series is split is very small patches. While this can
> annoy the reader - it helped me much to make sure I don't do anything
> wrong (well - I am still not sure) - and IMHO, it makes the review easier.
> For example, in patch
> iwlwifi: pcie: move the ICT / non-ICT handling functions
> I just copy code from place to place without changing a bit. This makes
> the significant diff smaller.
>
> Emmanuel Grumbach (10):
> iwlwifi: pcie: clean up ICT allocation code
> iwlwifi: pcie: track interrupt mask in SW
> iwlwifi: pcie: re-organize the PCIe ISR code
> iwlwifi: pcie: move the ICT / non-ICT handling functions
> iwlwifi: pcie: read the interrupt cause from the handler
> iwlwifi: pcie: determine the interrupt type in the handler
> iwlwifi: pcie: return inta from iwl_pcie_int_cause_{non_}ict
> iwlwifi: pcie: no need to save inta in trans_pcie
> iwlwifi: pcie: move interrupt prints to the common handler
> iwlwifi: pcie: stop using _irqsave
>
> drivers/net/wireless/iwlwifi/iwl-csr.h | 3 +-
> drivers/net/wireless/iwlwifi/pcie/internal.h | 9 +-
> drivers/net/wireless/iwlwifi/pcie/rx.c | 389 +++++++++++----------------
> drivers/net/wireless/iwlwifi/pcie/trans.c | 27 +-
> drivers/net/wireless/iwlwifi/pcie/tx.c | 10 +-
> 5 files changed, 185 insertions(+), 253 deletions(-)
>
> --
> 1.8.3.2
>
> --
> 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
--
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
