lirc: make chardev nonseekable

There does not seem to be a need for lirc to
allow seeking on the file descriptor, so let's
just disallow this before users start relying
on it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 5 insertions, 0 deletions

diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c
index 77b5946413c0..8a128934e605 100644
--- a/drivers/media/IR/ir-lirc-codec.c
+++ b/drivers/media/IR/ir-lirc-codec.c
@@ -235,6 +235,7 @@ static struct file_operations lirc_fops = {
         .poll           = lirc_dev_fop_poll,
         .open           = lirc_dev_fop_open,
         .release        = lirc_dev_fop_close,
+        .llseek         = no_llseek,
 };
 
 static int ir_lirc_register(struct input_dev *input_dev)
diff --git a/drivers/media/IR/lirc_dev.c b/drivers/media/IR/lirc_dev.c
index 899891bec352..5b145e8672fe 100644
--- a/drivers/media/IR/lirc_dev.c
+++ b/drivers/media/IR/lirc_dev.c
@@ -460,6 +460,8 @@ error:
 
         mutex_unlock(&lirc_dev_lock);
 
+        nonseekable_open(inode, file);
+
         return retval;
 }
 EXPORT_SYMBOL(lirc_dev_fop_open);
diff --git a/drivers/staging/lirc/lirc_serial.c b/drivers/staging/lirc/lirc_serial.c
index 9456f8e3f9ef..8da382492612 100644
--- a/drivers/staging/lirc/lirc_serial.c
+++ b/drivers/staging/lirc/lirc_serial.c
@@ -1058,6 +1058,7 @@ static const struct file_operations lirc_fops = {
         .poll           = lirc_dev_fop_poll,
         .open           = lirc_dev_fop_open,
         .release        = lirc_dev_fop_close,
+        .llseek         = no_llseek,
 };
 
 static struct lirc_driver driver = {
diff --git a/drivers/staging/lirc/lirc_sir.c b/drivers/staging/lirc/lirc_sir.c
index eb08fa7138ba..2478871bd95e 100644
--- a/drivers/staging/lirc/lirc_sir.c
+++ b/drivers/staging/lirc/lirc_sir.c
@@ -459,6 +459,7 @@ static const struct file_operations lirc_fops = {
         .unlocked_ioctl = lirc_ioctl,
         .open           = lirc_dev_fop_open,
         .release        = lirc_dev_fop_close,
+        .llseek         = no_llseek,
 };
 
 static int set_use_inc(void *data)