diff options
Diffstat (limited to 'drivers/usb/mon/mon_bin.c')
| -rw-r--r-- | drivers/usb/mon/mon_bin.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 094e812e9e69..35483217b1f6 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -1247,14 +1247,19 @@ static vm_fault_t mon_bin_vma_fault(struct vm_fault *vmf) struct mon_reader_bin *rp = vmf->vma->vm_private_data; unsigned long offset, chunk_idx; struct page *pageptr; + unsigned long flags; + spin_lock_irqsave(&rp->b_lock, flags); offset = vmf->pgoff << PAGE_SHIFT; - if (offset >= rp->b_size) + if (offset >= rp->b_size) { + spin_unlock_irqrestore(&rp->b_lock, flags); return VM_FAULT_SIGBUS; + } chunk_idx = offset / CHUNK_SIZE; pageptr = rp->b_vec[chunk_idx].pg; get_page(pageptr); vmf->page = pageptr; + spin_unlock_irqrestore(&rp->b_lock, flags); return 0; } |