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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.c60
1 files changed, 44 insertions, 16 deletions
diff --git a/drivers/misc/ioc4.c b/drivers/misc/ioc4.c
index 6a5a05d1f39..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>
@@ -75,7 +76,7 @@ ioc4_register_submodule(struct ioc4_submodule *is)
printk(KERN_WARNING
"%s: IOC4 submodule %s probe failed "
"for pci_dev %s",
- __FUNCTION__, module_name(is->is_owner),
+ __func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
@@ -102,7 +103,7 @@ ioc4_unregister_submodule(struct ioc4_submodule *is)
printk(KERN_WARNING
"%s: IOC4 submodule %s remove failed "
"for pci_dev %s.\n",
- __FUNCTION__, module_name(is->is_owner),
+ __func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
@@ -244,10 +245,11 @@ ioc4_variant(struct ioc4_driver_data *idd)
idd->idd_pdev->bus->number == pdev->bus->number &&
3 == PCI_SLOT(pdev->devfn))
found = 1;
- pci_dev_put(pdev);
} while (pdev && !found);
- if (NULL != pdev)
+ if (NULL != pdev) {
+ pci_dev_put(pdev);
return IOC4_VARIANT_IO9;
+ }
/* IO10: Look for a Vitesse VSC 7174 at the same bus and slot 3. */
pdev = NULL;
@@ -258,15 +260,24 @@ ioc4_variant(struct ioc4_driver_data *idd)
idd->idd_pdev->bus->number == pdev->bus->number &&
3 == PCI_SLOT(pdev->devfn))
found = 1;
- pci_dev_put(pdev);
} while (pdev && !found);
- if (NULL != pdev)
+ if (NULL != pdev) {
+ pci_dev_put(pdev);
return IOC4_VARIANT_IO10;
+ }
/* PCI-RT: No SCSI/SATA controller will be present */
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)
@@ -280,7 +291,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
if ((ret = pci_enable_device(pdev))) {
printk(KERN_WARNING
"%s: Failed to enable IOC4 device for pci_dev %s.\n",
- __FUNCTION__, pci_name(pdev));
+ __func__, pci_name(pdev));
goto out;
}
pci_set_master(pdev);
@@ -290,7 +301,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
if (!idd) {
printk(KERN_WARNING
"%s: Failed to allocate IOC4 data for pci_dev %s.\n",
- __FUNCTION__, pci_name(pdev));
+ __func__, pci_name(pdev));
ret = -ENODEV;
goto out_idd;
}
@@ -305,7 +316,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
printk(KERN_WARNING
"%s: Unable to find IOC4 misc resource "
"for pci_dev %s.\n",
- __FUNCTION__, pci_name(idd->idd_pdev));
+ __func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_pci;
}
@@ -314,7 +325,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
printk(KERN_WARNING
"%s: Unable to request IOC4 misc region "
"for pci_dev %s.\n",
- __FUNCTION__, pci_name(idd->idd_pdev));
+ __func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_pci;
}
@@ -324,7 +335,7 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
printk(KERN_WARNING
"%s: Unable to remap IOC4 misc region "
"for pci_dev %s.\n",
- __FUNCTION__, pci_name(idd->idd_pdev));
+ __func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_misc_region;
}
@@ -370,12 +381,27 @@ ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
printk(KERN_WARNING
"%s: IOC4 submodule 0x%s probe failed "
"for pci_dev %s.\n",
- __FUNCTION__, module_name(is->is_owner),
+ __func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
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:
@@ -404,7 +430,7 @@ ioc4_remove(struct pci_dev *pdev)
printk(KERN_WARNING
"%s: IOC4 submodule 0x%s remove failed "
"for pci_dev %s.\n",
- __FUNCTION__, module_name(is->is_owner),
+ __func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
@@ -416,7 +442,7 @@ ioc4_remove(struct pci_dev *pdev)
printk(KERN_WARNING
"%s: Unable to get IOC4 misc mapping for pci_dev %s. "
"Device removal may be incomplete.\n",
- __FUNCTION__, pci_name(idd->idd_pdev));
+ __func__, pci_name(idd->idd_pdev));
}
release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
@@ -450,16 +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);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 16:16:10 +0000