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[media] lirc: use kfifo_initialized() on lirc_buffer's fifo

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We can use kfifo_initialized() to check if the fifo in lirc_buffer is
initialized or not. There's no need to have a dedicated fifo status
variable in lirc_buffer.

[m.chehab@samsung.com: add the same change to lirc_zilog, to avoid
 breaking compilation of staging drivers]
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Martin Kaiser
2014-10-28 18:51:01 -03:00
committed by Mauro Carvalho Chehab
parent 373145282e
commit 77d381af73
2 changed files with 3 additions and 7 deletions
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8
include/media/lirc_dev.h
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@@ -29,14 +29,13 @@ struct lirc_buffer {
/* Using chunks instead of bytes pretends to simplify boundary checking
* And should allow for some performance fine tunning later */
struct kfifo fifo;
u8 fifo_initialized;
};
static inline void lirc_buffer_clear(struct lirc_buffer *buf)
{
unsigned long flags;
if (buf->fifo_initialized) {
if (kfifo_initialized(&buf->fifo)) {
spin_lock_irqsave(&buf->fifo_lock, flags);
kfifo_reset(&buf->fifo);
spin_unlock_irqrestore(&buf->fifo_lock, flags);
@@ -56,17 +55,14 @@ static inline int lirc_buffer_init(struct lirc_buffer *buf,
buf->chunk_size = chunk_size;
buf->size = size;
ret = kfifo_alloc(&buf->fifo, size * chunk_size, GFP_KERNEL);
if (ret == 0)
buf->fifo_initialized = 1;
return ret;
}
static inline void lirc_buffer_free(struct lirc_buffer *buf)
{
if (buf->fifo_initialized) {
if (kfifo_initialized(&buf->fifo)) {
kfifo_free(&buf->fifo);
buf->fifo_initialized = 0;
} else
WARN(1, "calling %s on an uninitialized lirc_buffer\n",
__func__);