ddi_intr_get_pending - get pending bit for a given interrupt
#include <sys/types.h> #include <sys/conf.h> #include <sys/ddi.h> #include <sys/sunddi.h> int ddi_intr_get_pending(ddi_intr_handle_t h, int *pendingp);
Solaris DDI specific (Solaris DDI).
DDI interrupt handle
Pointer to the pending capability returned for this handle
The ddi_intr_get_pending() function returns non-zero as the integer pointed to by the pendingp argument if a corresponding interrupt is pending. The corresponding interrupt handle h must already be enabled. The call succeeds if the device or host bridge supports the ability to read the interrupt pending bits of its interrupts. The driver should use ddi_intr_get_cap() function to see if the DDI_INTR_FLAG_PENDING flag is returned to indicate that interrupts support interrupt pending bits.
If the DDI_INTR_FLAG_PENDING capability is not supported, ddi_intr_get_pending() returns DDI_ENOTSUP and zero in pendingp.
The ddi_intr_get_pending() function returns:
On success.
On encountering invalid input parameters.
On any implementation specific failure.
On device not supporting operation.
The ddi_intr_get_pending() function can be called from either user or kernel non-interrupt context.
See attributes(5) for descriptions of the following attributes:
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attributes(5), ddi_intr_block_enable(9F), ddi_intr_block_disable(9F), ddi_intr_clr_mask(9F), ddi_intr_disable(9F), ddi_intr_enable(9F), ddi_intr_set_mask(9F)
Writing Device Drivers for Oracle Solaris 11.3
Any consumer of this interface should verify that the return value is not equal to DDI_SUCCESS. Incomplete checking for failure codes could result in inconsistent behavior among platforms.