#define IORESOURCE_MEM_64 0x00100000
#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
+#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
#define IORESOURCE_DISABLED 0x10000000
}
/* Convenience shorthand with allocation */
-#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
+#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
+#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
#define request_mem_region_exclusive(start,n,name) \
#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
+#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/device.h>
#include <linux/pfn.h>
* release_region releases a matching busy region.
*/
+static DECLARE_WAIT_QUEUE_HEAD(muxed_resource_wait);
+
/**
* __request_region - create a new busy resource region
* @parent: parent resource descriptor
resource_size_t start, resource_size_t n,
const char *name, int flags)
{
+ DECLARE_WAITQUEUE(wait, current);
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res)
if (!(conflict->flags & IORESOURCE_BUSY))
continue;
}
-
+ if (conflict->flags & flags & IORESOURCE_MUXED) {
+ add_wait_queue(&muxed_resource_wait, &wait);
+ write_unlock(&resource_lock);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule();
+ remove_wait_queue(&muxed_resource_wait, &wait);
+ write_lock(&resource_lock);
+ continue;
+ }
/* Uhhuh, that didn't work out.. */
kfree(res);
res = NULL;
break;
*p = res->sibling;
write_unlock(&resource_lock);
+ if (res->flags & IORESOURCE_MUXED)
+ wake_up(&muxed_resource_wait);
kfree(res);
return;
}