From 77d381af73e905c48b992d5d8426376469bc9576 Mon Sep 17 00:00:00 2001 From: Martin Kaiser Date: Tue, 28 Oct 2014 18:51:01 -0300 Subject: [PATCH] [media] lirc: use kfifo_initialized() on lirc_buffer's fifo 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/lirc/lirc_zilog.c | 2 +- include/media/lirc_dev.h | 8 ++------ 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c index 567feba..1ccf626 100644 --- a/drivers/staging/media/lirc/lirc_zilog.c +++ b/drivers/staging/media/lirc/lirc_zilog.c @@ -199,7 +199,7 @@ static void release_ir_device(struct kref *ref) lirc_unregister_driver(ir->l.minor); ir->l.minor = MAX_IRCTL_DEVICES; } - if (ir->rbuf.fifo_initialized) + if (kfifo_initialized(&ir->rbuf.fifo)) lirc_buffer_free(&ir->rbuf); list_del(&ir->list); kfree(ir); diff --git a/include/media/lirc_dev.h b/include/media/lirc_dev.h index 78f0637..05e7ad5 100644 --- a/include/media/lirc_dev.h +++ b/include/media/lirc_dev.h @@ -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__); -- 2.7.4