joel16/android_kernel_sony_msm8994
1
0
Fork 0
mirror of https://github.com/joel16/android_kernel_sony_msm8994.git synced 2024-11-24 20:50:30 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ioc4: automatically load sgiioc4 subordinate module

Browse Source 
Modify ioc4 to always load the sgiioc4 IDE module if the board carrying
the IOC4 hardware actually implements the IDE interface (not all boards
bring this functionality off the IOC4 chip).  A drive hosted on the IDE
interface may contain the root filesystem, and sgiioc4 doesn't load
automatically as ioc4 owns the PCI device ID, not sgiioc4.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Michael Reed <mdr@sgi.com>
Signed-off-by: Brent Casavant <bcasavan@sgi.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Brent Casavant 2009-01-06 14:41:06 -08:00 committed by Linus Torvalds
parent bfa0b1c3ca
commit 08adefd479
1 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/misc/ioc4.c
View File

@ -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);
}