Have a second struct acpi_rmrr_unit pointer, starting out as NULL
and getting set to the current one when the callback returns a
positive value. Skip further iterations as long as both pointers
match.
Great!
int intel_iommu_get_reserved_device_memory(iommu_grdm_t *func, void *ctxt)
{
struct acpi_rmrr_unit *rmrr, *rmrr_cur = NULL;
int rc = 0;
unsigned int i;
u16 bdf;
for_each_rmrr_device ( rmrr, bdf, i )
{
if ( rmrr != rmrr_cur )
{
rc = func(PFN_DOWN(rmrr->base_address),
PFN_UP(rmrr->end_address) -
PFN_DOWN(rmrr->base_address),
PCI_SBDF(rmrr->segment, bdf),
ctxt);
if ( unlikely(rc < 0) )
return rc;
/* Hit this entry so just go next. */
if ( rc > 0 )
rmrr_cur = rmrr;
}
}
return 0;
}
Thanks
Tiejun
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