FAILED: patch "[PATCH] misc: pci_endpoint_test: Fix 'irq_type' to convey the correct" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x baaef0a274cfb75f9b50eab3ef93205e604f662c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025041753-handwork-fried-4309@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From baaef0a274cfb75f9b50eab3ef93205e604f662c Mon Sep 17 00:00:00 2001
From: Kunihiko Hayashi <[email protected]>
Date: Tue, 25 Feb 2025 20:02:50 +0900
Subject: [PATCH] misc: pci_endpoint_test: Fix 'irq_type' to convey the correct
type
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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 is displayed in old version of "pcitest" as follows:

- Result of running "pcitest -i 0"

SET IRQ TYPE TO LEGACY: OKAY

- Result of running "pcitest -I"

GET IRQ TYPE: MSI

Whereas running the new version of "pcitest" in kselftest results in an error as follows:

# 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

Fix this issue by propagating the current type to the global "irq_type".

index acf3d8dab131..896392c428de 100644
@@ -833,6 +833,7 @@ static int pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
 		return ret;
 	}
 
+	irq_type = test->irq_type;
 	return 0;
 }
 

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 is displayed in old version of "pcitest" as follows:

- Result of running "pcitest -i 0"

SET IRQ TYPE TO LEGACY: OKAY

- Result of running "pcitest -I"

GET IRQ TYPE: MSI

Whereas running the new version of "pcitest" in kselftest results in an error as follows:

# 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

Fix this issue by propagating the current type to the global "irq_type".

---
 drivers/misc/pci_endpoint_test.c | 1 +
 1 file changed, 1 insertion(+)

index 525b34714049..7b5fc0a50231 100644
@@ -717,6 +717,7 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
 	if (!pci_endpoint_test_request_irq(test))
 		goto err;
 
+	irq_type = test->irq_type;
 	return true;
 
 err:

2.25.1

[ Sasha's backport helper bot ]

Hi,

Summary of potential issues:
⚠️ Found matching upstream commit but patch is missing proper reference to it

Found matching upstream commit: baaef0a274cfb75f9b50eab3ef93205e604f662c

Status in newer kernel trees:

6.14.y | Present (different SHA1: 30ade0da493e)
6.13.y | Not found
6.12.y | Not found

6.6.y | Not found

Note: The patch differs from the upstream commit:
---

1:  baaef0a274cfb < -:  ------------- misc: pci_endpoint_test: Fix 'irq_type' to convey the correct type
-:  ------------- > 1:  319e40852ec27 misc: pci_endpoint_test: Fix 'irq_type' to convey the correct type

---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y        |  Success    |  Success   |