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dmaengine: cleanup with list_first_entry_or_null() 

The combo of list_empty() check and return list_first_entry()
can be replaced with list_first_entry_or_null().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Masahiro Yamada 2016-09-13 03:08:17 +09:00 committed by Vinod Koul
parent aa570be6de
commit 360af35b08
4 changed files with 13 additions and 57 deletions
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22
drivers/dma/coh901318.c
View File

@ -1553,15 +1553,8 @@ coh901318_desc_submit(struct coh901318_chan *cohc, struct coh901318_desc *desc)
static struct coh901318_desc *
coh901318_first_active_get(struct coh901318_chan *cohc)
{
struct coh901318_desc *d;
if (list_empty(&cohc->active))
return NULL;
d = list_first_entry(&cohc->active,
struct coh901318_desc,
node);
return d;
return list_first_entry_or_null(&cohc->active, struct coh901318_desc,
node);
}
static void
@ -1579,15 +1572,8 @@ coh901318_desc_queue(struct coh901318_chan *cohc, struct coh901318_desc *desc)
static struct coh901318_desc *
coh901318_first_queued(struct coh901318_chan *cohc)
{
struct coh901318_desc *d;
if (list_empty(&cohc->queue))
return NULL;
d = list_first_entry(&cohc->queue,
struct coh901318_desc,
node);
return d;
return list_first_entry_or_null(&cohc->queue, struct coh901318_desc,
node);
}
static inline u32 coh901318_get_bytes_in_lli(struct coh901318_lli *in_lli)

6
drivers/dma/ep93xx_dma.c
View File

@ -262,10 +262,8 @@ static void ep93xx_dma_set_active(struct ep93xx_dma_chan *edmac,
static struct ep93xx_dma_desc *
ep93xx_dma_get_active(struct ep93xx_dma_chan *edmac)
{
if (list_empty(&edmac->active))
return NULL;
return list_first_entry(&edmac->active, struct ep93xx_dma_desc, node);
return list_first_entry_or_null(&edmac->active,
struct ep93xx_dma_desc, node);
}
/**

36
drivers/dma/ste_dma40.c
View File

@ -941,15 +941,7 @@ static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
static struct d40_desc *d40_first_active_get(struct d40_chan *d40c)
{
struct d40_desc *d;
if (list_empty(&d40c->active))
return NULL;
d = list_first_entry(&d40c->active,
struct d40_desc,
node);
return d;
return list_first_entry_or_null(&d40c->active, struct d40_desc, node);
}
/* remove desc from current queue and add it to the pending_queue */
@ -962,36 +954,18 @@ static void d40_desc_queue(struct d40_chan *d40c, struct d40_desc *desc)
static struct d40_desc *d40_first_pending(struct d40_chan *d40c)
{
struct d40_desc *d;
if (list_empty(&d40c->pending_queue))
return NULL;
d = list_first_entry(&d40c->pending_queue,
struct d40_desc,
node);
return d;
return list_first_entry_or_null(&d40c->pending_queue, struct d40_desc,
node);
}
static struct d40_desc *d40_first_queued(struct d40_chan *d40c)
{
struct d40_desc *d;
if (list_empty(&d40c->queue))
return NULL;
d = list_first_entry(&d40c->queue,
struct d40_desc,
node);
return d;
return list_first_entry_or_null(&d40c->queue, struct d40_desc, node);
}
static struct d40_desc *d40_first_done(struct d40_chan *d40c)
{
if (list_empty(&d40c->done))
return NULL;
return list_first_entry(&d40c->done, struct d40_desc, node);
return list_first_entry_or_null(&d40c->done, struct d40_desc, node);
}
static int d40_psize_2_burst_size(bool is_log, int psize)

6
drivers/dma/virt-dma.h
View File

@ -123,10 +123,8 @@ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd)
*/
static inline struct virt_dma_desc *vchan_next_desc(struct virt_dma_chan *vc)
{
if (list_empty(&vc->desc_issued))
return NULL;
return list_first_entry(&vc->desc_issued, struct virt_dma_desc, node);
return list_first_entry_or_null(&vc->desc_issued,
struct virt_dma_desc, node);
}
/**