From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [GIT PULL] iommu/arm-smmu: Fixes for 4.9
Date: Thu, 3 Nov 2016 18:29:13 +0100 [thread overview]
Message-ID: <20161103172913.GT3541@8bytes.org> (raw)
In-Reply-To: <a6ded15c-5eea-70b8-61a1-b40873af8699-5wv7dgnIgG8@public.gmane.org>
On Thu, Nov 03, 2016 at 04:57:40PM +0000, Robin Murphy wrote:
> But if it is someone else's ops, then all that means is that the SMMU
> driver isn't going to get notified about devices on that bus, or get
> called with them later, so I still don't see where the problem is. If
> there are devices on that bus which the SMMU *is* supposed to be
> managing, then that system can't be supported with the current API anyway.
If another IOMMU is already probed and set its iommu_ops, than there is
no point in probing the smmu anyway, no? The probe function should
return the failed probe in that case and not proceed silently.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: joro@8bytes.org (Joerg Roedel)
To: linux-arm-kernel@lists.infradead.org
Subject: [GIT PULL] iommu/arm-smmu: Fixes for 4.9
Date: Thu, 3 Nov 2016 18:29:13 +0100 [thread overview]
Message-ID: <20161103172913.GT3541@8bytes.org> (raw)
In-Reply-To: <a6ded15c-5eea-70b8-61a1-b40873af8699@arm.com>
On Thu, Nov 03, 2016 at 04:57:40PM +0000, Robin Murphy wrote:
> But if it is someone else's ops, then all that means is that the SMMU
> driver isn't going to get notified about devices on that bus, or get
> called with them later, so I still don't see where the problem is. If
> there are devices on that bus which the SMMU *is* supposed to be
> managing, then that system can't be supported with the current API anyway.
If another IOMMU is already probed and set its iommu_ops, than there is
no point in probing the smmu anyway, no? The probe function should
return the failed probe in that case and not proceed silently.
Joerg
next prev parent reply other threads:[~2016-11-03 17:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-28 16:01 [GIT PULL] iommu/arm-smmu: Fixes for 4.9 Will Deacon
2016-10-28 16:01 ` Will Deacon
[not found] ` <20161028160148.GD1076-5wv7dgnIgG8@public.gmane.org>
2016-11-03 15:33 ` Joerg Roedel
2016-11-03 15:33 ` Joerg Roedel
[not found] ` <20161103153303.GA837-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-03 16:00 ` Will Deacon
2016-11-03 16:00 ` Will Deacon
[not found] ` <20161103160006.GS22791-5wv7dgnIgG8@public.gmane.org>
2016-11-03 16:14 ` Joerg Roedel
2016-11-03 16:14 ` Joerg Roedel
[not found] ` <20161103161407.GR3541-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-03 16:22 ` Robin Murphy
2016-11-03 16:22 ` Robin Murphy
[not found] ` <0dbf2665-4292-d49a-b9e7-688bcdf29c6e-5wv7dgnIgG8@public.gmane.org>
2016-11-03 16:29 ` Joerg Roedel
2016-11-03 16:29 ` Joerg Roedel
[not found] ` <20161103162943.GS3541-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2016-11-03 16:57 ` Robin Murphy
2016-11-03 16:57 ` Robin Murphy
[not found] ` <a6ded15c-5eea-70b8-61a1-b40873af8699-5wv7dgnIgG8@public.gmane.org>
2016-11-03 17:29 ` Joerg Roedel [this message]
2016-11-03 17:29 ` Joerg Roedel
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