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authorStefan Richter <stefanr@s5r6.in-berlin.de>2010-04-10 15:47:18 (GMT)
committerStefan Richter <stefanr@s5r6.in-berlin.de>2010-04-10 14:51:15 (GMT)
commit7cfe21aae155c26193fde617dc61d37a79a63f86 (patch)
tree6600d3171afdfad430155f5e8a1f526367a6174d /drivers/ieee1394/raw1394.c
parent3ac26b2ee30005930117fe6a180c139c5f300faf (diff)
downloadlinux-fsl-qoriq-7cfe21aae155c26193fde617dc61d37a79a63f86.tar.xz
ieee1394: mark char device files as not seekable
The - raw1394 (/dev/raw1394), - video1394 (/dev/video1394/*), - dv1394 (/dev/dv1394/*) character device file ABIs do not make any use of lseek(), pread(), or pwrite(). Therefore use nonseekable_open() and, redundantly, set file_operations.llseek to no_llseek to remove any doubt whether the BKL- grabbing default_llseek handler is used. Although all this is legacy code which should be left in peace until it is eventually removed (as it is superseded by firewire-core's <linux/firewire-cdev.h> ABI), this change seems still worth doing to further minimize the presence of BKL usage in the kernel. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/ieee1394/raw1394.c')
-rw-r--r--drivers/ieee1394/raw1394.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ieee1394/raw1394.c b/drivers/ieee1394/raw1394.c
index 8aa56ac..b563d5e 100644
--- a/drivers/ieee1394/raw1394.c
+++ b/drivers/ieee1394/raw1394.c
@@ -2834,7 +2834,7 @@ static int raw1394_open(struct inode *inode, struct file *file)
file->private_data = fi;
- return 0;
+ return nonseekable_open(inode, file);
}
static int raw1394_release(struct inode *inode, struct file *file)
@@ -3035,6 +3035,7 @@ static const struct file_operations raw1394_fops = {
.poll = raw1394_poll,
.open = raw1394_open,
.release = raw1394_release,
+ .llseek = no_llseek,
};
static int __init init_raw1394(void)