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dmaengine: sh: rz-dmac: Use list_first_entry_or_null()

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Use list_first_entry_or_null() instead of open-coding it with a
list_empty() check and list_first_entry(). This simplifies the code.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260526084710.3491480-4-claudiu.beznea@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Claudiu Beznea 2026-05-26 11:46:55 +03:00 committed by Vinod Koul
parent 5fbf3a2a3b
commit 89975baaa9
1 changed files with 4 additions and 6 deletions
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10
drivers/dma/sh/rz-dmac.c
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@ -503,11 +503,10 @@ rz_dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
__func__, channel->index, &src, &dest, len);
scoped_guard(spinlock_irqsave, &channel->vc.lock) {
if (list_empty(&channel->ld_free))
desc = list_first_entry_or_null(&channel->ld_free, struct rz_dmac_desc, node);
if (!desc)
return NULL;
desc = list_first_entry(&channel->ld_free, struct rz_dmac_desc, node);
desc->type = RZ_DMAC_DESC_MEMCPY;
desc->src = src;
desc->dest = dest;
@ -533,11 +532,10 @@ rz_dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
int i = 0;
scoped_guard(spinlock_irqsave, &channel->vc.lock) {
if (list_empty(&channel->ld_free))
desc = list_first_entry_or_null(&channel->ld_free, struct rz_dmac_desc, node);
if (!desc)
return NULL;
desc = list_first_entry(&channel->ld_free, struct rz_dmac_desc, node);
for_each_sg(sgl, sg, sg_len, i)
dma_length += sg_dma_len(sg);