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path: root/drivers/misc/ioc4.c
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Diffstat (limited to 'drivers/misc/ioc4.c')
-rw-r--r--drivers/misc/ioc4.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
index 6f76573e7c8..60b0b1a4fb3 100644
--- 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);
}