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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-20 15:36:52 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-20 15:36:52 +1000
commit880102e78547c1db158a17e36cf0cdd98e7ad710 (patch)
tree3fff9cc54c44dafe275cfabefb96c589e08d971d /drivers/uio/uio.c
parent3d07f0e83d4323d2cd45cc583f7cf1957aca3cac (diff)
parent39ab05c8e0b519ff0a04a869f065746e6e8c3d95 (diff)
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Merge remote branch 'origin/master' into merge
Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi() call to arch/powerpc/platforms/cell/interrupt.c Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/uio/uio.c')
-rw-r--r--drivers/uio/uio.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 51fe179..d2efe82 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -381,7 +381,13 @@ static int uio_get_minor(struct uio_device *idev)
retval = -ENOMEM;
goto exit;
}
- idev->minor = id & MAX_ID_MASK;
+ if (id < UIO_MAX_DEVICES) {
+ idev->minor = id;
+ } else {
+ dev_err(idev->dev, "too many uio devices\n");
+ retval = -EINVAL;
+ idr_remove(&uio_idr, id);
+ }
exit:
mutex_unlock(&minor_lock);
return retval;
@@ -587,14 +593,12 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
static int uio_find_mem_index(struct vm_area_struct *vma)
{
- int mi;
struct uio_device *idev = vma->vm_private_data;
- for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
- if (idev->info->mem[mi].size == 0)
+ if (vma->vm_pgoff < MAX_UIO_MAPS) {
+ if (idev->info->mem[vma->vm_pgoff].size == 0)
return -1;
- if (vma->vm_pgoff == mi)
- return mi;
+ return (int)vma->vm_pgoff;
}
return -1;
}