Search Linux Wireless

Re: [PATCH 6/6] iwlwifi: fix access to prph when transport is stopped

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Luca Coelho <luca@xxxxxxxxx> writes:

> On Fri, 2017-12-08 at 14:26 +0200, Kalle Valo wrote:
>> Kalle Valo <kvalo@xxxxxxxxxxxxxx> writes:
>> 
>> > Luca Coelho <luca@xxxxxxxxx> writes:
>> > 
>> > > On Wed, 2017-11-29 at 12:23 +0200, Kalle Valo wrote:
>> > > 
>> > > > But no wonder I called gnus-article-fill-cited-article, the
>> > > > commit
>> > > > log is just weirdly wrapped. Are you using outlook or how do
>> > > > you get
>> > > > it so ugly? :)
>> > > 
>> > > Heh! I don't think it's wrapped weirdly, it's just that the
>> > > paragraphs
>> > > don't have spaces between them, right? ;)
>> > 
>> > Sorry, don't get what you mean with missing spaces. To me (and
>> > patchwork[1] and git[2] seem to agree) the word wrapping is just
>> > broken
>> > for this commit log, and I have seen it also with other iwlwifi
>> > commits.
>> > For example, there are just two words in the second line "two
>> > paths."
>> > 
>> > The standard format for git commit logs is something like this:
>> > 
>> > -----------------------------------------------------------------
>> > -----
>> > When getting HW rfkill we get stop_device being called from two
>> > paths.
>> > One path is the IRQ calling stop device, and updating op mode and
>> > stack.
>> > As a result, cfg80211 is running rfkill sync work that shuts down
>> > all
>> > devices (second path). In the second path, we eventually get to
>> > iwl_mvm_stop_device which calls iwl_fw_dump_conf_clear-
>> > >iwl_fw_dbg_stop_recording,
>> > that access periphery registers.
>> > 
>> > The device may be stopped at this point from the first path,
>> > which will result with a failure to access those registers. Simply
>> > checking for the trans status is insufficient, since the race will
>> > still
>> > exist, only minimized. Instead, move the stop from
>> > iwl_fw_dump_conf_clear (which is getting called only from stop
>> > path) to
>> > the transport stop device function, where the access is always
>> > safe.
>> > This has the added value, of actually stopping dbgc before stopping
>> > device even when the stop is initiated from the transport.
>> > -----------------------------------------------------------------
>> > -----
>> > 
>> > [1] https://patchwork.kernel.org/patch/10074849/
>> 
>> Instead of trying to get what I mean, check instead the patchwork
>> page
>> and compare there the original commit log with my reformatted
>> version. I
>> think that visualises pretty well what I'm trying to say :)
>
> Okay, granted, but that's not really because of alignment or line-
> wrapping.  It's because the paragraphs are broken too often.
>
> In any case, I'll pay more attention to this.  So my questions remains,
> do you want me to remake my pull-req to fix this?

This commit is already in wireless-drivers, so no need to resend. I was
just trying to give an example of what I was trying to say.

-- 
Kalle Valo



[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Wireless Personal Area Network]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Hiking]     [MIPS Linux]     [ARM Linux]     [Linux RAID]

  Powered by Linux