scripts/coccinelle/misc/irqf_oneshot.cocci

Source file repositories/reference/linux-study-clean/scripts/coccinelle/misc/irqf_oneshot.cocci

File Facts

System
Linux kernel
Corpus path
scripts/coccinelle/misc/irqf_oneshot.cocci
Extension
.cocci
Size
2007 bytes
Lines
114
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: scripts
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/// Since commit 1c6c69525b40 ("genirq: Reject bogus threaded irq requests")
/// threaded IRQs without a primary handler need to be requested with
/// IRQF_ONESHOT, otherwise the request will fail.
///
/// So pass the IRQF_ONESHOT flag in this case.
///
//
// Confidence: Moderate
// Comments:
// Options: --no-includes

virtual patch
virtual context
virtual org
virtual report

@r1@
expression dev, irq, thread_fn;
position p;
@@
(
request_threaded_irq@p(irq, NULL, thread_fn,
(
IRQF_ONESHOT | ...
|
IRQF_ONESHOT
)
, ...)
|
devm_request_threaded_irq@p(dev, irq, NULL, thread_fn,
(
IRQF_ONESHOT | ...
|
IRQF_ONESHOT
)
, ...)
)

@r2@
expression dev, irq, thread_fn, flags, e;
position p != r1.p;
@@
(
flags = IRQF_ONESHOT | ...
|
flags |= IRQF_ONESHOT | ...
)
... when != flags = e
(
request_threaded_irq@p(irq, NULL, thread_fn, flags, ...);
|
devm_request_threaded_irq@p(dev, irq, NULL, thread_fn, flags, ...);
)

@depends on patch@
expression dev, irq, thread_fn, flags;
position p != {r1.p,r2.p};
@@
(
request_threaded_irq@p(irq, NULL, thread_fn,
(
-0
+IRQF_ONESHOT
|
-flags
+flags | IRQF_ONESHOT
)
, ...)
|

Annotation

Implementation Notes