diff options
author | Federico Vaga <federico.vaga@gmail.com> | 2011-10-29 09:45:39 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:54:42 -0800 |
commit | 3762465d4a6c6a92a93d361b95dd453fd736ba73 (patch) | |
tree | 949323bc7c567cd834f528345e44bb1b53efa02b /drivers/staging/rtl8712/usb_ops_linux.c | |
parent | 7994d8747d9ac088be8a2136dc25ea30135ca1e8 (diff) |
Staging: comedi: fix mmap_count
commit df30b21cb0eed5ba8a8e0cdfeebc66ba8cde821d upstream.
In comedi_fops, mmap_count is decremented at comedi_vm_ops->close but
it is not incremented at comedi_vm_ops->open. This may result in a negative
counter. The patch introduces the open method to keep the counter
consistent.
The bug was triggerd by this sample code:
mmap(0, ...., comedi_fd);
fork();
exit(0);
Acked-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/rtl8712/usb_ops_linux.c')
0 files changed, 0 insertions, 0 deletions