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Subject[PATCH v2 1/5] misc: pci_endpoint_test: Avoid using module parameter to determine irqtype
Date
commit e03327122e2c ("pci_endpoint_test: Add 2 ioctl commands")
uses module parameter 'irqtype' in pci_endpoint_test_set_irq()
to check if irq vectors of a particular type (MSI or MSI-X or
LEGACY) is already allocated. However with multi-function devices,
'irqtype' will not correctly reflect the irq type of the PCI device.
Fix it here by adding 'irqtype' for each PCI device to show the
irq type of a particular PCI device.

Fixes: e03327122e2c ("pci_endpoint_test: Add 2 ioctl commands")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/misc/pci_endpoint_test.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 8682867ac14a..ca680635d7a9 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -103,6 +103,7 @@ struct pci_endpoint_test {
struct completion irq_raised;
int last_irq;
int num_irqs;
+ int irq_type;
/* mutex to protect the ioctls */
struct mutex mutex;
struct miscdevice miscdev;
@@ -162,6 +163,7 @@ static void pci_endpoint_test_free_irq_vectors(struct pci_endpoint_test *test)
struct pci_dev *pdev = test->pdev;

pci_free_irq_vectors(pdev);
+ test->irq_type = IRQ_TYPE_UNDEFINED;
}

static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
@@ -196,6 +198,8 @@ static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
irq = 0;
res = false;
}
+
+ test->irq_type = type;
test->num_irqs = irq;

return res;
@@ -340,6 +344,7 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test,
dma_addr_t orig_dst_phys_addr;
size_t offset;
size_t alignment = test->alignment;
+ int irq_type = test->irq_type;
u32 src_crc32;
u32 dst_crc32;
int err;
@@ -473,6 +478,7 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test,
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
+ int irq_type = test->irq_type;
size_t size;
u32 crc32;
int err;
@@ -571,6 +577,7 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test,
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
+ int irq_type = test->irq_type;
u32 crc32;
int err;

@@ -656,7 +663,7 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
return false;
}

- if (irq_type == req_irq_type)
+ if (test->irq_type == req_irq_type)
return true;

pci_endpoint_test_release_irq(test);
@@ -668,12 +675,10 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
if (!pci_endpoint_test_request_irq(test))
goto err;

- irq_type = req_irq_type;
return true;

err:
pci_endpoint_test_free_irq_vectors(test);
- irq_type = IRQ_TYPE_UNDEFINED;
return false;
}

@@ -753,6 +758,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
test->test_reg_bar = 0;
test->alignment = 0;
test->pdev = pdev;
+ test->irq_type = IRQ_TYPE_UNDEFINED;

if (no_msi)
irq_type = IRQ_TYPE_LEGACY;
--
2.17.1
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