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SubjectRe: [PATCH v3] staging: r8188eu: Use kzalloc() with GFP_ATOMIC in atomic context
Date
On Sunday, November 7, 2021 2:29:47 PM CET Greg Kroah-Hartman wrote:
> On Sun, Nov 07, 2021 at 02:15:59PM +0100, Fabio M. De Francesco wrote:
> > On Sunday, November 7, 2021 1:38:35 PM CET Greg Kroah-Hartman wrote:
> > > On Sun, Nov 07, 2021 at 12:43:51PM +0100, Fabio M. De Francesco wrote:
> > > > On Monday, November 1, 2021 8:18:47 PM CET Fabio M. De Francesco
wrote:
> > > > > Use the GFP_ATOMIC flag of kzalloc() with two memory allocation in
> > > > > report_del_sta_event(). This function is called while holding
> > spinlocks,
> > > > > therefore it is not allowed to sleep. With the GFP_ATOMIC type
flag,
> > the
> > > > > allocation is high priority and must not sleep.
> > > > >
> > > > > This issue is detected by Smatch which emits the following warning:
> > > > > "drivers/staging/r8188eu/core/rtw_mlme_ext.c:6848
> > report_del_sta_event()
> > > > > warn: sleeping in atomic context".
> > > > >
> > > > > After the change, the post-commit hook output the following
message:
> > > > > "CHECK: Prefer kzalloc(sizeof(*pcmd_obj)...) over
> > > > > kzalloc(sizeof(struct cmd_obj)...)".
> > > > >
> > > > > According to the above "CHECK", use the preferred style in the
first
> > > > > kzalloc().
> > > > >
> > > > > Fixes: 79f712ea994d ("staging: r8188eu: Remove wrappers for
kalloc()
> > and
> > > > kzalloc()")
> > > > > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
> > > > > ---
> >
> > > > > [...]
> >
> > > > Please let me know if there is something that prevents this patch to
be
> > > > applied. I have no problem in changing / adding whatever it is
needed.
> > >
> > > Nothing needs to be done, I am waiting for 5.16-rc1 to be released
> > > before I pick up this patch, and others that will be targeted for
> > > 5.16-final. Only then will I queue them up, as the automated email you
> > > should have gotten when you submitted the patch said would happen.
> > >
> > > Just relax, there is no rush here :)
> > >
> >
> > Oh, sorry Greg. There must be something that I haven't understand about
the
> > development process... :(
> >
> > Obviously I agree that there is no rush here :)
> >
> > As I said, this morning I read git log and saw patches that seemed more
> > recent; thus I thought that was the case to ask. I just (wrongly) thought
> > that the v3 of the patch got unnoticed or dropped because of some
requests
> > that I had missed.
>
> Be sure to notice what branch commits are being applied to. There are
> different branches for a reason :)
>
This is what confuses me:

--- git-log output ---

commit 8a893759d0075ea9556abcf86a4826d9865ba4bf (origin/staging-testing)
Author: Phillip Potter <phil@philpotter.co.uk>
Date: Sat Nov 6 23:16:36 2021 +0000

staging: r8188eu: remove MSG_88E macro

--- end of git-log output ---

Aside from the "Date" field, I know that this patch has been sent to the list
during the last night and that it goes to the same branch (staging-testing)
to which my patch should go. I know I'm still missing something, but I cannot
understand what it is... :(

Anyway, never mind. I don't want to bother you with this silly questions :)

Again, thanks,

Fabio


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