diff options
| author | Radim Krčmář <[email protected]> | 2018-02-01 14:04:17 +0000 |
|---|---|---|
| committer | Radim Krčmář <[email protected]> | 2018-02-01 14:04:17 +0000 |
| commit | 7bf14c28ee776be567855bd39ed8ff795ea19f55 (patch) | |
| tree | 6113748c673e85fccc2c56c050697789c00c6bc2 /drivers/usb/mon/mon_bin.c | |
| parent | kvm: x86: remove efer_reload entry in kvm_vcpu_stat (diff) | |
| parent | x86/kvm: Make it compile on 32bit and with HYPYERVISOR_GUEST=n (diff) | |
| download | kernel-7bf14c28ee776be567855bd39ed8ff795ea19f55.tar.gz kernel-7bf14c28ee776be567855bd39ed8ff795ea19f55.zip | |
Merge branch 'x86/hyperv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Topic branch for stable KVM clockource under Hyper-V.
Thanks to Christoffer Dall for resolving the ARM conflict.
Diffstat (limited to 'drivers/usb/mon/mon_bin.c')
| -rw-r--r-- | drivers/usb/mon/mon_bin.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index f6ae753ab99b..f932f40302df 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -1004,7 +1004,9 @@ static long mon_bin_ioctl(struct file *file, unsigned int cmd, unsigned long arg break; case MON_IOCQ_RING_SIZE: + mutex_lock(&rp->fetch_lock); ret = rp->b_size; + mutex_unlock(&rp->fetch_lock); break; case MON_IOCT_RING_SIZE: @@ -1231,12 +1233,16 @@ static int mon_bin_vma_fault(struct vm_fault *vmf) unsigned long offset, chunk_idx; struct page *pageptr; + mutex_lock(&rp->fetch_lock); offset = vmf->pgoff << PAGE_SHIFT; - if (offset >= rp->b_size) + if (offset >= rp->b_size) { + mutex_unlock(&rp->fetch_lock); return VM_FAULT_SIGBUS; + } chunk_idx = offset / CHUNK_SIZE; pageptr = rp->b_vec[chunk_idx].pg; get_page(pageptr); + mutex_unlock(&rp->fetch_lock); vmf->page = pageptr; return 0; } |