1 files changed, 112 insertions, 0 deletions

diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
index a1af2f989482..ffdb12a59c40 100644
--- a/drivers/pnp/quirks.c
+++ b/drivers/pnp/quirks.c
@@ -111,6 +111,113 @@ static void quirk_sb16audio_resources(struct pnp_dev *dev)
                 dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
 }
 
+static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
+{
+        struct pnp_option *head = NULL;
+        struct pnp_option *prev = NULL;
+        struct pnp_option *res;
+
+        /*
+         * Build a functional IRQ-less variant of each MPU option.
+         */
+
+        for (res = dev->dependent; res; res = res->next) {
+                struct pnp_option *curr;
+                struct pnp_port *port;
+                struct pnp_port *copy;
+
+                port = res->port;
+                if (!port || !res->irq)
+                        continue;
+
+                copy = pnp_alloc(sizeof *copy);
+                if (!copy)
+                        break;
+
+                copy->min = port->min;
+                copy->max = port->max;
+                copy->align = port->align;
+                copy->size = port->size;
+                copy->flags = port->flags;
+
+                curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
+                if (!curr) {
+                        kfree(copy);
+                        break;
+                }
+                curr->port = copy;
+
+                if (prev)
+                        prev->next = curr;
+                else
+                        head = curr;
+                prev = curr;
+        }
+        if (head)
+                dev_info(&dev->dev, "adding IRQ-less MPU options\n");
+
+        return head;
+}
+
+static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
+{
+        struct pnp_option *res;
+        struct pnp_irq *irq;
+
+        /*
+         * Distribute the independent IRQ over the dependent options
+         */
+
+        res = dev->independent;
+        if (!res)
+                return;
+
+        irq = res->irq;
+        if (!irq || irq->next)
+                return;
+
+        res = dev->dependent;
+        if (!res)
+                return;
+
+        while (1) {
+                struct pnp_irq *copy;
+
+                copy = pnp_alloc(sizeof *copy);
+                if (!copy)
+                        break;
+
+                memcpy(copy->map, irq->map, sizeof copy->map);
+                copy->flags = irq->flags;
+
+                copy->next = res->irq; /* Yes, this is NULL */
+                res->irq = copy;
+
+                if (!res->next)
+                        break;
+                res = res->next;
+        }
+        kfree(irq);
+
+        res->next = quirk_isapnp_mpu_options(dev);
+
+        res = dev->independent;
+        res->irq = NULL;
+}
+
+static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
+{
+        struct pnp_option *res;
+
+        res = dev->dependent;
+        if (!res)
+                return;
+
+        while (res->next)
+                res = res->next;
+
+        res->next = quirk_isapnp_mpu_options(dev);
+}
 
 #include <linux/pci.h>
 
@@ -205,6 +312,11 @@ static struct pnp_fixup pnp_fixups[] = {
         {"CTL0043", quirk_sb16audio_resources},
         {"CTL0044", quirk_sb16audio_resources},
         {"CTL0045", quirk_sb16audio_resources},
+        /* Add IRQ-less MPU options */
+        {"ADS7151", quirk_ad1815_mpu_resources},
+        {"ADS7181", quirk_isapnp_mpu_resources},
+        {"AZT0002", quirk_isapnp_mpu_resources},
+        /* PnP resources that might overlap PCI BARs */
         {"PNP0c01", quirk_system_pci_resources},
         {"PNP0c02", quirk_system_pci_resources},
         {""}