linux-kernel - [PATCH 4/5] misc: pci_endpoint_test: Do not request or allocate IRQs in probe

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Date:   Tue, 6 Jul 2021 16:20:34 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>, Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>
CC:     Lokesh Vutla <lokeshvutla@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tom Joseph <tjoseph@...ence.com>, <linux-pci@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Nadeem Athani <nadeem@...ence.com>
Subject: [PATCH 4/5] misc: pci_endpoint_test: Do not request or allocate IRQs in probe

Allocation of IRQ vectors and requesting IRQ is done as part of
PCITEST_SET_IRQTYPE. Do not request or allocate IRQs in probe for
AM654 and J721E so that the user space test script has better control
of the devices for which the IRQs are configured. Since certain user
space scripts could rely on allocation of IRQ vectors during probe,
remove allocation of IRQs only for TI's K3 platform.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/misc/pci_endpoint_test.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index c7ee34013485..9740f2a0e7cd 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -79,6 +79,9 @@
 #define PCI_DEVICE_ID_RENESAS_R8A774C0		0x002d
 #define PCI_DEVICE_ID_RENESAS_R8A774E1		0x0025
 
+#define is_j721e_pci_dev(pdev)         \
+		((pdev)->device == PCI_DEVICE_ID_TI_J721E)
+
 static DEFINE_IDA(pci_endpoint_test_ida);
 
 #define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
@@ -810,9 +813,11 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 
 	pci_set_master(pdev);
 
-	if (!pci_endpoint_test_alloc_irq_vectors(test, irq_type)) {
-		err = -EINVAL;
-		goto err_disable_irq;
+	if (!(is_am654_pci_dev(pdev) || is_j721e_pci_dev(pdev))) {
+		if (!pci_endpoint_test_alloc_irq_vectors(test, irq_type)) {
+			err = -EINVAL;
+			goto err_disable_irq;
+		}
 	}
 
 	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
@@ -850,9 +855,11 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 		goto err_ida_remove;
 	}
 
-	if (!pci_endpoint_test_request_irq(test)) {
-		err = -EINVAL;
-		goto err_kfree_test_name;
+	if (!(is_am654_pci_dev(pdev) || is_j721e_pci_dev(pdev))) {
+		if (!pci_endpoint_test_request_irq(test)) {
+			err = -EINVAL;
+			goto err_kfree_test_name;
+		}
 	}
 
 	misc_device = &test->miscdev;
-- 
2.17.1