linux-kernel - Re: [PATCH v2 2/3] misc: pci_endpoint_test: Fix disyplaying irq_type after request

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Message-ID: <20250128142017.hoq77lo3aybbbgqr@thinkpad>
Date: Tue, 28 Jan 2025 19:50:17 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Cc: Krzysztof Wilczy���ski <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 <helgaas@...nel.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2 2/3] misc: pci_endpoint_test: Fix disyplaying irq_type
 after request_irq error

On Wed, Jan 22, 2025 at 11:24:45AM +0900, Kunihiko Hayashi wrote:
> There are two variables that indicate the interrupt type to be used
> in the next test execution, global "irq_type" and test->irq_type.
> 
> The former is referenced from pci_endpoint_test_get_irq() to preserve
> the current type for ioctl(PCITEST_GET_IRQTYPE).
> 
> In pci_endpoint_test_request_irq(), since this global variable is
> referenced when an error occurs, the unintended error message is
> displayed.
> 
> For example, the following message shows "MSI 3" even if the current
> irq type becomes "MSI-X".
> 
>     # pcitest -i 2
>     pci-endpoint-test 0000:01:00.0: Failed to request IRQ 30 for MSI 3
>     SET IRQ TYPE TO MSI-X:          NOT OKAY
> 
> Fix this issue by using test->irq_type instead of global "irq_type".
> 
> Cc: stable@...r.kernel.org
> Fixes: b2ba9225e031 ("misc: pci_endpoint_test: Avoid using module parameter to determine irqtype")
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/misc/pci_endpoint_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
> index 302955c20979..a342587fc78a 100644
> --- a/drivers/misc/pci_endpoint_test.c
> +++ b/drivers/misc/pci_endpoint_test.c
> @@ -235,7 +235,7 @@ static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test)
>  	return true;
>  
>  fail:
> -	switch (irq_type) {
> +	switch (test->irq_type) {
>  	case IRQ_TYPE_INTX:
>  		dev_err(dev, "Failed to request IRQ %d for Legacy\n",
>  			pci_irq_vector(pdev, i));
> -- 
> 2.25.1
> 

-- 
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