mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-02 17:49:03 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

genirq/devres: Add error handling in devm_request_*_irq()

Browse source 
devm_request_threaded_irq() and devm_request_any_context_irq() currently
don't print any error message when interrupt registration fails.

This forces each driver to implement redundant error logging - over 2,000
lines of error messages exist across drivers. Additionally, when
upper-layer functions propagate these errors without logging, critical
debugging information is lost.

Add devm_request_result() helper to unify error reporting via dev_err_probe(),

Use it in devm_request_threaded_irq() and devm_request_any_context_irq()
printing device name, IRQ number, handler functions, and error code on failure
automatically.

Co-developed-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Pan Chuang <panchuang@vivo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250805092922.135500-2-panchuang@vivo.com
This commit is contained in:
Pan Chuang 2025-08-05 17:29:22 +08:00 committed by Thomas Gleixner
parent 7a721a2fee
commit 55b48e23f5
1 changed files with 87 additions and 40 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

127
kernel/irq/devres.c
View file

@ -30,29 +30,22 @@ static int devm_irq_match(struct device *dev, void *res, void *data)
return this->irq == match->irq && this->dev_id == match->dev_id;
}
/**
* devm_request_threaded_irq - allocate an interrupt line for a managed device
* @dev: device to request interrupt for
* @irq: Interrupt line to allocate
* @handler: Function to be called when the IRQ occurs
* @thread_fn: function to be called in a threaded interrupt context. NULL
* for devices which handle everything in @handler
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
* @dev_id: A cookie passed back to the handler function
*
* Except for the extra @dev argument, this function takes the
* same arguments and performs the same function as
* request_threaded_irq(). IRQs requested with this function will be
* automatically freed on driver detach.
*
* If an IRQ allocated with this function needs to be freed
* separately, devm_free_irq() must be used.
*/
int devm_request_threaded_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, irq_handler_t thread_fn,
unsigned long irqflags, const char *devname,
void *dev_id)
static int devm_request_result(struct device *dev, int rc, unsigned int irq,
irq_handler_t handler, irq_handler_t thread_fn,
const char *devname)
{
if (rc >= 0)
return rc;
return dev_err_probe(dev, rc, "request_irq(%u) %ps %ps %s\n",
irq, handler, thread_fn, devname ? : "");
}
static int __devm_request_threaded_irq(struct device *dev, unsigned int irq,
irq_handler_t handler,
irq_handler_t thread_fn,
unsigned long irqflags,
const char *devname, void *dev_id)
{
struct irq_devres *dr;
int rc;
@ -78,28 +71,48 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq,
return 0;
}
EXPORT_SYMBOL(devm_request_threaded_irq);
/**
* devm_request_any_context_irq - allocate an interrupt line for a managed device
* @dev: device to request interrupt for
* @irq: Interrupt line to allocate
* @handler: Function to be called when the IRQ occurs
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
* @dev_id: A cookie passed back to the handler function
* devm_request_threaded_irq - allocate an interrupt line for a managed device with error logging
* @dev: Device to request interrupt for
* @irq: Interrupt line to allocate
* @handler: Function to be called when the interrupt occurs
* @thread_fn: Function to be called in a threaded interrupt context. NULL
* for devices which handle everything in @handler
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
* @dev_id: A cookie passed back to the handler function
*
* Except for the extra @dev argument, this function takes the
* same arguments and performs the same function as
* request_any_context_irq(). IRQs requested with this function will be
* automatically freed on driver detach.
* Except for the extra @dev argument, this function takes the same
* arguments and performs the same function as request_threaded_irq().
* Interrupts requested with this function will be automatically freed on
* driver detach.
*
* If an IRQ allocated with this function needs to be freed
* separately, devm_free_irq() must be used.
* If an interrupt allocated with this function needs to be freed
* separately, devm_free_irq() must be used.
*
* When the request fails, an error message is printed with contextual
* information (device name, interrupt number, handler functions and
* error code). Don't add extra error messages at the call sites.
*
* Return: 0 on success or a negative error number.
*/
int devm_request_any_context_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, unsigned long irqflags,
const char *devname, void *dev_id)
int devm_request_threaded_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, irq_handler_t thread_fn,
unsigned long irqflags, const char *devname,
void *dev_id)
{
int rc = __devm_request_threaded_irq(dev, irq, handler, thread_fn,
irqflags, devname, dev_id);
return devm_request_result(dev, rc, irq, handler, thread_fn, devname);
}
EXPORT_SYMBOL(devm_request_threaded_irq);
static int __devm_request_any_context_irq(struct device *dev, unsigned int irq,
irq_handler_t handler,
unsigned long irqflags,
const char *devname, void *dev_id)
{
struct irq_devres *dr;
int rc;
@ -124,6 +137,40 @@ int devm_request_any_context_irq(struct device *dev, unsigned int irq,
return rc;
}
/**
* devm_request_any_context_irq - allocate an interrupt line for a managed device with error logging
* @dev: Device to request interrupt for
* @irq: Interrupt line to allocate
* @handler: Function to be called when the interrupt occurs
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device, dev_name(dev) if NULL
* @dev_id: A cookie passed back to the handler function
*
* Except for the extra @dev argument, this function takes the same
* arguments and performs the same function as request_any_context_irq().
* Interrupts requested with this function will be automatically freed on
* driver detach.
*
* If an interrupt allocated with this function needs to be freed
* separately, devm_free_irq() must be used.
*
* When the request fails, an error message is printed with contextual
* information (device name, interrupt number, handler functions and
* error code). Don't add extra error messages at the call sites.
*
* Return: IRQC_IS_HARDIRQ or IRQC_IS_NESTED on success, or a negative error
* number.
*/
int devm_request_any_context_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, unsigned long irqflags,
const char *devname, void *dev_id)
{
int rc = __devm_request_any_context_irq(dev, irq, handler, irqflags,
devname, dev_id);
return devm_request_result(dev, rc, irq, handler, NULL, devname);
}
EXPORT_SYMBOL(devm_request_any_context_irq);
/**