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dmaengine: sh: rz-dmac: Use rz_lmdesc_setup() to invalidate descriptors

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rz_lmdesc_setup() invalidates DMA descriptors more comprehensively.
It resets the base, head, and tail pointers of the descriptor list and
clears the descriptor headers and their NXLA pointers. Use
rz_lmdesc_setup() instead of open-coding parts of its logic.

Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260316133252.240348-7-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
John Madieu
2026-03-16 15:32:50 +02:00
committed by Vinod Koul
parent be25945d0c
commit bfaa60be64
1 changed files with 2 additions and 8 deletions
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10
drivers/dma/sh/rz-dmac.c
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@@ -460,15 +460,12 @@ static void rz_dmac_free_chan_resources(struct dma_chan *chan)
{
struct rz_dmac_chan *channel = to_rz_dmac_chan(chan);
struct rz_dmac *dmac = to_rz_dmac(chan->device);
struct rz_lmdesc *lmdesc = channel->lmdesc.base;
struct rz_dmac_desc *desc, *_desc;
unsigned long flags;
unsigned int i;
spin_lock_irqsave(&channel->vc.lock, flags);
for (i = 0; i < DMAC_NR_LMDESC; i++)
lmdesc[i].header = 0;
rz_lmdesc_setup(channel, channel->lmdesc.base);
rz_dmac_disable_hw(channel);
list_splice_tail_init(&channel->ld_active, &channel->ld_free);
@@ -560,15 +557,12 @@ rz_dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
static int rz_dmac_terminate_all(struct dma_chan *chan)
{
struct rz_dmac_chan *channel = to_rz_dmac_chan(chan);
struct rz_lmdesc *lmdesc = channel->lmdesc.base;
unsigned long flags;
unsigned int i;
LIST_HEAD(head);
spin_lock_irqsave(&channel->vc.lock, flags);
rz_dmac_disable_hw(channel);
for (i = 0; i < DMAC_NR_LMDESC; i++)
lmdesc[i].header = 0;
rz_lmdesc_setup(channel, channel->lmdesc.base);
list_splice_tail_init(&channel->ld_active, &channel->ld_free);
list_splice_tail_init(&channel->ld_queue, &channel->ld_free);