From: Rahul Singh <Rahul.Singh@arm.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"Paul Durrant" <paul@xen.org>,
"Roger Pau Monné" <roger.pau@citrix.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>
Subject: Re: [PATCH v2 1/3] PCI: simplify (and thus correct) pci_get_pdev{,_by_domain}()
Date: Thu, 11 Aug 2022 16:15:36 +0000 [thread overview]
Message-ID: <19F45D6B-45E6-4F10-B6F7-089796E0D5D4@arm.com> (raw)
In-Reply-To: <ad2d9405-9712-79bd-16d7-666ce79bcb3c@suse.com>
Hi Jan,
> On 11 Aug 2022, at 11:51 am, Jan Beulich <jbeulich@suse.com> wrote:
>
> The last "wildcard" use of either function went away with f591755823a7
> ("IOMMU/PCI: don't let domain cleanup continue when device de-assignment
> failed"). Don't allow them to be called this way anymore. Besides
> simplifying the code this also fixes two bugs:
>
> 1) When seg != -1, the outer loops should have been terminated after the
> first iteration, or else a device with the same BDF but on another
> segment could be found / returned.
>
> Reported-by: Rahul Singh <rahul.singh@arm.com>
>
> 2) When seg == -1 calling get_pseg() is bogus. The function (taking a
> u16) would look for segment 0xffff, which might exist. If it exists,
> we might then find / return a wrong device.
>
> In pci_get_pdev_by_domain() also switch from using the per-segment list
> to using the per-domain one, with the exception of the hardware domain
> (see the code comment there).
>
> While there also constify "pseg" and drop "pdev"'s already previously
> unnecessary initializer.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
I tested the patch series on ARM and it works as expected.
Reviewed-by: Rahul Singh <rahul.singh@arm.com>
Tested-by: Rahul Singh <rahul.singh@arm.com>
Regards,
Rahul
next prev parent reply other threads:[~2022-08-11 16:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-11 10:50 [PATCH v2 0/3] PCI: re-work pci_get_pdev() and friends Jan Beulich
2022-08-11 10:51 ` [PATCH v2 1/3] PCI: simplify (and thus correct) pci_get_pdev{,_by_domain}() Jan Beulich
2022-08-11 13:11 ` Andrew Cooper
2022-08-11 13:21 ` Jan Beulich
2022-08-11 16:15 ` Rahul Singh [this message]
2022-08-11 10:52 ` [PATCH v2 2/3] PCI: fold pci_get_pdev{,_by_domain}() Jan Beulich
2022-08-11 13:21 ` Andrew Cooper
2022-08-11 13:26 ` Jan Beulich
2022-08-11 15:09 ` Andrew Cooper
2022-08-11 15:41 ` Jan Beulich
2022-08-11 16:17 ` Rahul Singh
2022-08-11 10:52 ` [PATCH v2 3/3] PCI: bring pci_get_real_pdev() in line with pci_get_pdev() Jan Beulich
2022-08-11 13:28 ` Andrew Cooper
2022-08-11 16:16 ` Rahul Singh
2022-08-11 16:37 ` [PATCH] x86/msi: Switch msi_info to using pci_sbdf_t Andrew Cooper
2022-08-12 6:45 ` Jan Beulich
2022-08-12 10:22 ` Andrew Cooper
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