[PATCH 07/19] lirc_dev: remove kmalloc in lirc_dev_fop_read()

[David Härdeman]

lirc_zilog uses a chunk_size of 2 and ir-lirc-codec uses sizeof(int).

Therefore, using stack memory should be perfectly fine.

Signed-off-by: David Härdeman <da...@hardeman.nu>
---
 drivers/media/rc/lirc_dev.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index 1773a2934484..92048d945ba7 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -376,7 +376,7 @@ ssize_t lirc_dev_fop_read(struct file *file,
                          loff_t *ppos)
 {
        struct irctl *ir = file->private_data;
-       unsigned char *buf;
+       unsigned char buf[ir->buf->chunk_size];
        int ret = 0, written = 0;
        DECLARE_WAITQUEUE(wait, current);
 
@@ -385,10 +385,6 @@ ssize_t lirc_dev_fop_read(struct file *file,
 
        dev_dbg(ir->d.dev, LOGHEAD "read called\n", ir->d.name, ir->d.minor);
 
-       buf = kzalloc(ir->buf->chunk_size, GFP_KERNEL);
-       if (!buf)
-               return -ENOMEM;
-
        if (mutex_lock_interruptible(&ir->irctl_lock)) {
                ret = -ERESTARTSYS;
                goto out_unlocked;
@@ -464,8 +460,6 @@ ssize_t lirc_dev_fop_read(struct file *file,
        mutex_unlock(&ir->irctl_lock);
 
 out_unlocked:
-       kfree(buf);
-
        return ret ? ret : written;
 }
 EXPORT_SYMBOL(lirc_dev_fop_read);