summaryrefslogtreecommitdiff
path: root/drivers/lguest/lguest_device.c
diff options
context:
space:
mode:
authorIngo Molnar <mingo@elte.hu>2008-06-25 12:30:33 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-25 12:30:33 +0200
commit48cf937f48f68bd1e61f37c6357dbff5adb95532 (patch)
treed9e2368a419adc2c11691be2842c66213bec5a42 /drivers/lguest/lguest_device.c
parentfce39665abb71d01d74ac74eb13dd69a799dfc2f (diff)
parent543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff)
Merge branch 'linus' into x86/i8259tip-x86-i8259-2008-06-25_10.30_Wed
Diffstat (limited to 'drivers/lguest/lguest_device.c')
-rw-r--r--drivers/lguest/lguest_device.c25
1 files changed, 10 insertions, 15 deletions
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 8080249957af..1a8de57289eb 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -20,14 +20,11 @@
/* The pointer to our (page) of device descriptions. */
static void *lguest_devices;
-/* Unique numbering for lguest devices. */
-static unsigned int dev_index;
-
/* For Guests, device memory can be used as normal memory, so we cast away the
* __iomem to quieten sparse. */
static inline void *lguest_map(unsigned long phys_addr, unsigned long pages)
{
- return (__force void *)ioremap(phys_addr, PAGE_SIZE*pages);
+ return (__force void *)ioremap_cache(phys_addr, PAGE_SIZE*pages);
}
static inline void lguest_unmap(void *addr)
@@ -325,8 +322,10 @@ static struct device lguest_root = {
* As Andrew Tridgell says, "Untested code is buggy code".
*
* It's worth reading this carefully: we start with a pointer to the new device
- * descriptor in the "lguest_devices" page. */
-static void add_lguest_device(struct lguest_device_desc *d)
+ * descriptor in the "lguest_devices" page, and the offset into the device
+ * descriptor page so we can uniquely identify it if things go badly wrong. */
+static void add_lguest_device(struct lguest_device_desc *d,
+ unsigned int offset)
{
struct lguest_device *ldev;
@@ -334,18 +333,14 @@ static void add_lguest_device(struct lguest_device_desc *d)
* it. */
ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
if (!ldev) {
- printk(KERN_EMERG "Cannot allocate lguest dev %u\n",
- dev_index++);
+ printk(KERN_EMERG "Cannot allocate lguest dev %u type %u\n",
+ offset, d->type);
return;
}
/* This devices' parent is the lguest/ dir. */
ldev->vdev.dev.parent = &lguest_root;
/* We have a unique device index thanks to the dev_index counter. */
- ldev->vdev.index = dev_index++;
- /* The device type comes straight from the descriptor. There's also a
- * device vendor field in the virtio_device struct, which we leave as
- * 0. */
ldev->vdev.id.device = d->type;
/* We have a simple set of routines for querying the device's
* configuration information and setting its status. */
@@ -357,8 +352,8 @@ static void add_lguest_device(struct lguest_device_desc *d)
* virtio_device and calls device_register(). This makes the bus
* infrastructure look for a matching driver. */
if (register_virtio_device(&ldev->vdev) != 0) {
- printk(KERN_ERR "Failed to register lguest device %u\n",
- ldev->vdev.index);
+ printk(KERN_ERR "Failed to register lguest dev %u type %u\n",
+ offset, d->type);
kfree(ldev);
}
}
@@ -379,7 +374,7 @@ static void scan_devices(void)
break;
printk("Device at %i has size %u\n", i, desc_size(d));
- add_lguest_device(d);
+ add_lguest_device(d, i);
}
}