linux-kernel - Re: [PATCH v3 3/5] misc: pci_endpoint_test: Fix irq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20250220074122.xaeefquqwh2xwsxz@thinkpad>
Date: Thu, 20 Feb 2025 13:11:22 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Cc: Krzysztof Wilczynski <kw@...ux.com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v3 3/5] misc: pci_endpoint_test: Fix irq_type to convey
 the correct type

On Mon, Feb 17, 2025 at 08:26:44PM +0900, Kunihiko Hayashi wrote:
> Hi Manivannan,
> 
> On 2025/02/15 2:25, Manivannan Sadhasivam wrote:
> > On Mon, Feb 10, 2025 at 04:58:10PM +0900, Kunihiko Hayashi wrote:
> > > There are two variables that indicate the interrupt type to be used
> > > in the next test execution, "irq_type" as global and test->irq_type.
> > > 
> > > The global is referenced from pci_endpoint_test_get_irq() to preserve
> > > the current type for ioctl(PCITEST_GET_IRQTYPE).
> > > 
> > > The type set in this function isn't reflected in the global "irq_type",
> > > so ioctl(PCITEST_GET_IRQTYPE) returns the previous type.
> > > As a result, the wrong type will be displayed in "pcitest" as follows:
> > > 
> > >      # pcitest -i 0
> > >      SET IRQ TYPE TO LEGACY:         OKAY
> > >      # pcitest -I
> > >      GET IRQ TYPE:           MSI
> > > 
> > 
> > Could you please post the failure with kselftest that got merged into
> > v6.14-rc1?
> 
> The kselftest doesn't call GET_IRQTYPE, so current kselftest doesn't fail.
> 
> If necessary, I can add GET_IRQTYPE test after SET_IRQTYPE of each
> interrupt test prior to this patch.
> 
>         pci_ep_ioctl(PCITEST_SET_IRQTYPE, 0);
>         ASSERT_EQ(0, ret) TH_LOG("Can't set Legacy IRQ type");
> 
> +       pci_ep_ioctl(PCITEST_GET_IRQTYPE, 0);
> +       ASSERT_EQ(0, ret) TH_LOG("Can't get Legacy IRQ type");
> 

Sure.

> However, pci_ep_ioctl() returns zero if OK, the return value should be
> changed to the actual return value.
> 
>  #define pci_ep_ioctl(cmd, arg)                 \
>  ({                                             \
>         ret = ioctl(self->fd, cmd, arg);        \
> -       ret = ret < 0 ? -errno : 0;             \
> +       ret = ret < 0 ? -errno : ret;           \
>  })
> 

Ok.

> Before applying the patch, this test fails.
> 
> #  RUN           pci_ep_basic.LEGACY_IRQ_TEST ...
> # pci_endpoint_test.c:104:LEGACY_IRQ_TEST:Expected 0 (0) == ret (1)
> # pci_endpoint_test.c:104:LEGACY_IRQ_TEST:Can't get Legacy IRQ type
> # LEGACY_IRQ_TEST: Test terminated by assertion
> #          FAIL  pci_ep_basic.LEGACY_IRQ_TEST
> 

Looks good to me.

- Mani

-- 
மணிவண்ணன் சதாசிவம்