Pull pvops into release branch

[linux-2.6-omap-h63xx.git] / drivers / misc / ioc4.c

diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
index 6f76573e7c8a244bdac0be865a1a1df72bfee94c..60b0b1a4fb3a8ff7817c14d59a490f2665f4e933 100644 (file)
--- a/drivers/misc/ioc4.c
+++ b/drivers/misc/ioc4.c
@@ -269,6 +269,16 @@ ioc4_variant(struct ioc4_driver_data *idd)
        return IOC4_VARIANT_PCI_RT;
 }
 
+static void
+ioc4_load_modules(struct work_struct *work)
+{
+       /* arg just has to be freed */
+
+       request_module("sgiioc4");
+
+       kfree(work);
+}
+
 /* Adds a new instance of an IOC4 card */
 static int
 ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
@@ -378,6 +388,30 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
        }
        mutex_unlock(&ioc4_mutex);
 
+       /* Request sgiioc4 IDE driver on boards that bring that functionality
+        * off of IOC4.  The root filesystem may be hosted on a drive connected
+        * to IOC4, so we need to make sure the sgiioc4 driver is loaded as it
+        * won't be picked up by modprobes due to the ioc4 module owning the
+        * PCI device.
+        */
+       if (idd->idd_variant != IOC4_VARIANT_PCI_RT) {
+               struct work_struct *work;
+               work = kzalloc(sizeof(struct work_struct), GFP_KERNEL);
+               if (!work) {
+                       printk(KERN_WARNING
+                              "%s: IOC4 unable to allocate memory for "
+                              "load of sub-modules.\n", __func__);
+               } else {
+                       /* Request the module from a work procedure as the
+                        * modprobe goes out to a userland helper and that
+                        * will hang if done directly from ioc4_probe().
+                        */
+                       printk(KERN_INFO "IOC4 loading sgiioc4 submodule\n");
+                       INIT_WORK(work, ioc4_load_modules);
+                       schedule_work(work);
+               }
+       }
+
        return 0;
 
 out_misc_region:
@@ -462,6 +496,8 @@ ioc4_init(void)
 static void __devexit
 ioc4_exit(void)
 {
+       /* Ensure ioc4_load_modules() has completed before exiting */
+       flush_scheduled_work();
        pci_unregister_driver(&ioc4_driver);
 }