diff options
Diffstat (limited to 'drivers/misc/ioc4.c')
| -rw-r--r-- | drivers/misc/ioc4.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c index 6f76573e7c8..06f6ad29cef 100644 --- a/drivers/misc/ioc4.c +++ b/drivers/misc/ioc4.c @@ -30,6 +30,7 @@ #include <linux/pci.h> #include <linux/ioc4.h> #include <linux/ktime.h> +#include <linux/slab.h> #include <linux/mutex.h> #include <linux/time.h> #include <asm/io.h> @@ -269,6 +270,14 @@ ioc4_variant(struct ioc4_driver_data *idd) return IOC4_VARIANT_PCI_RT; } +static void +ioc4_load_modules(struct work_struct *work) +{ + request_module("sgiioc4"); +} + +static DECLARE_WORK(ioc4_load_modules_work, ioc4_load_modules); + /* 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 +387,21 @@ 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) { + /* 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"); + schedule_work(&ioc4_load_modules_work); + } + return 0; out_misc_region: @@ -452,16 +476,18 @@ MODULE_DEVICE_TABLE(pci, ioc4_id_table); *********************/ /* Module load */ -static int __devinit +static int __init ioc4_init(void) { return pci_register_driver(&ioc4_driver); } /* Module unload */ -static void __devexit +static void __exit ioc4_exit(void) { + /* Ensure ioc4_load_modules() has completed before exiting */ + flush_work(&ioc4_load_modules_work); pci_unregister_driver(&ioc4_driver); } |