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From: "Leonardo Brás" <leobras.c@gmail.com>
To: Frederic Barrat <fbarrat@linux.ibm.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Alexey Kardashevskiy <aik@ozlabs.ru>,
	David Gibson <david@gibson.dropbear.id.au>,
	kernel test robot <lkp@intel.com>,
	Nicolin Chen <nicoleotsuka@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 08/11] powerpc/pseries/iommu: Update remove_dma_window() to accept property name
Date: Tue, 17 Aug 2021 02:59:46 -0300	[thread overview]
Message-ID: <2653ee3e582ba181651e4842821e64d3323fa566.camel@gmail.com> (raw)
In-Reply-To: <8dbd08fb-375c-9f21-f8ab-bec163b157bf@linux.ibm.com>

Hello Fred, thanks for the feedback!

On Tue, 2021-07-20 at 19:51 +0200, Frederic Barrat wrote:
> 
> 
> On 16/07/2021 10:27, Leonardo Bras wrote:
> > Update remove_dma_window() so it can be used to remove DDW with a
> > given
> > property name.
> > 
> > This enables the creation of new property names for DDW, so we can
> > have different usage for it, like indirect mapping.
> > 
> > Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
> > Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> > ---
> >   arch/powerpc/platforms/pseries/iommu.c | 21 +++++++++++----------
> >   1 file changed, 11 insertions(+), 10 deletions(-)
> > 
> > diff --git a/arch/powerpc/platforms/pseries/iommu.c
> > b/arch/powerpc/platforms/pseries/iommu.c
> > index 108c3dcca686..17c6f4706e76 100644
> > --- a/arch/powerpc/platforms/pseries/iommu.c
> > +++ b/arch/powerpc/platforms/pseries/iommu.c
> > @@ -830,31 +830,32 @@ static void remove_dma_window(struct
> > device_node *np, u32 *ddw_avail,
> >                         np, ret, ddw_avail[DDW_REMOVE_PE_DMA_WIN],
> > liobn);
> >   }
> >   
> > -static void remove_ddw(struct device_node *np, bool remove_prop)
> > +static int remove_ddw(struct device_node *np, bool remove_prop,
> > const char *win_name)
> >   {
> 
> 
> Why switch to returning an int? None of the callers check it.

IIRC, in a previous version it did make sense, which is not the case
anymore. I will revert this.

Thanks!

> 
>    Fred



  reply	other threads:[~2021-08-17  5:59 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16  8:27 [PATCH v5 00/11] DDW + Indirect Mapping Leonardo Bras
2021-07-16  8:27 ` [PATCH v5 01/11] powerpc/pseries/iommu: Replace hard-coded page shift Leonardo Bras
2021-07-19 13:48   ` Frederic Barrat
2021-07-19 18:43     ` Leonardo Brás
2021-07-16  8:27 ` [PATCH v5 02/11] powerpc/kernel/iommu: Add new iommu_table_in_use() helper Leonardo Bras
2021-07-19 13:53   ` Frederic Barrat
2021-07-20  5:38     ` Leonardo Brás
2021-07-20  9:41       ` Alexey Kardashevskiy
2021-07-16  8:27 ` [PATCH v5 03/11] powerpc/pseries/iommu: Add iommu_pseries_alloc_table() helper Leonardo Bras
2021-07-19 14:04   ` Frederic Barrat
2021-07-19 18:47     ` Leonardo Brás
2021-07-16  8:27 ` [PATCH v5 04/11] powerpc/pseries/iommu: Add ddw_list_new_entry() helper Leonardo Bras
2021-07-19 14:14   ` Frederic Barrat
2021-07-19 18:47     ` Leonardo Brás
2021-07-16  8:27 ` [PATCH v5 05/11] powerpc/pseries/iommu: Allow DDW windows starting at 0x00 Leonardo Bras
2021-07-20 17:44   ` Frederic Barrat
2021-07-16  8:27 ` [PATCH v5 06/11] powerpc/pseries/iommu: Add ddw_property_create() and refactor enable_ddw() Leonardo Bras
2021-07-20 17:49   ` Frederic Barrat
2021-08-17  5:59     ` Leonardo Brás
2021-07-16  8:27 ` [PATCH v5 07/11] powerpc/pseries/iommu: Reorganize iommu_table_setparms*() with new helper Leonardo Bras
2021-07-20 17:50   ` Frederic Barrat
2021-07-16  8:27 ` [PATCH v5 08/11] powerpc/pseries/iommu: Update remove_dma_window() to accept property name Leonardo Bras
2021-07-20 17:51   ` Frederic Barrat
2021-08-17  5:59     ` Leonardo Brás [this message]
2021-08-17  6:12       ` Leonardo Brás
2021-08-24  6:31         ` Alexey Kardashevskiy
2021-07-16  8:27 ` [PATCH v5 09/11] powerpc/pseries/iommu: Find existing DDW with given " Leonardo Bras
2021-07-20 17:52   ` Frederic Barrat
2021-07-16  8:27 ` [PATCH v5 10/11] powerpc/pseries/iommu: Make use of DDW for indirect mapping Leonardo Bras
2021-07-20 18:12   ` Frederic Barrat
2021-07-21  3:32     ` Alexey Kardashevskiy
2021-07-21 15:04       ` Frederic Barrat
2021-07-23  5:34         ` Alexey Kardashevskiy
2021-08-17  5:59           ` Leonardo Brás
2021-08-17  5:59       ` Leonardo Brás
2021-07-16  8:27 ` [PATCH v5 11/11] powerpc/pseries/iommu: Rename "direct window" to "dma window" Leonardo Bras
2021-07-20 18:12   ` Frederic Barrat

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