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([82.78.167.17]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-432bd5ee243sm15399033f8f.31.2026.01.08.02.36.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jan 2026 02:36:29 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: vkoul@kernel.org, fabrizio.castro.jz@renesas.com, geert+renesas@glider.be, prabhakar.mahadev-lad.rj@bp.renesas.com, biju.das.jz@bp.renesas.com Cc: claudiu.beznea@tuxon.dev, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 6/8] dmaengine: sh: rz-dmac: Add rz_dmac_invalidate_lmdesc() Date: Thu, 8 Jan 2026 12:36:18 +0200 Message-ID: <20260108103620.3482147-7-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260108103620.3482147-1-claudiu.beznea.uj@bp.renesas.com> References: <20260108103620.3482147-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Biju Das Add rz_dmac_invalidate_lmdesc() so that the same code can be shared between rz_dmac_terminate_all() and rz_dmac_free_chan_resources(). Based on a patch in the BSP by Long Luu . Signed-off-by: Biju Das [claudiu.beznea: adjusted the commit description; defined the lmdesc inside the for block to have more compact code] Signed-off-by: Claudiu Beznea --- Changes in v7: - none Changes in v6: - none Changes in v5: - adjusted the commit description - defined the lmdesc inside the for block drivers/dma/sh/rz-dmac.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index 72ec42fedac6..45c45053e9df 100644 --- a/drivers/dma/sh/rz-dmac.c +++ b/drivers/dma/sh/rz-dmac.c @@ -250,6 +250,13 @@ static void rz_lmdesc_setup(struct rz_dmac_chan *chann= el, * Descriptors preparation */ =20 +static void rz_dmac_invalidate_lmdesc(struct rz_dmac_chan *channel) +{ + for (struct rz_lmdesc *lmdesc =3D channel->lmdesc.base; + lmdesc < channel->lmdesc.base + DMAC_NR_LMDESC; lmdesc++) + lmdesc->header =3D 0; +} + static void rz_dmac_lmdesc_recycle(struct rz_dmac_chan *channel) { struct rz_lmdesc *lmdesc =3D channel->lmdesc.head; @@ -456,15 +463,12 @@ static void rz_dmac_free_chan_resources(struct dma_ch= an *chan) { struct rz_dmac_chan *channel =3D to_rz_dmac_chan(chan); struct rz_dmac *dmac =3D to_rz_dmac(chan->device); - struct rz_lmdesc *lmdesc =3D channel->lmdesc.base; struct rz_dmac_desc *desc, *_desc; unsigned long flags; - unsigned int i; =20 spin_lock_irqsave(&channel->vc.lock, flags); =20 - for (i =3D 0; i < DMAC_NR_LMDESC; i++) - lmdesc[i].header =3D 0; + rz_dmac_invalidate_lmdesc(channel); =20 rz_dmac_disable_hw(channel); list_splice_tail_init(&channel->ld_active, &channel->ld_free); @@ -556,15 +560,12 @@ rz_dmac_prep_slave_sg(struct dma_chan *chan, struct s= catterlist *sgl, static int rz_dmac_terminate_all(struct dma_chan *chan) { struct rz_dmac_chan *channel =3D to_rz_dmac_chan(chan); - struct rz_lmdesc *lmdesc =3D channel->lmdesc.base; unsigned long flags; - unsigned int i; LIST_HEAD(head); =20 spin_lock_irqsave(&channel->vc.lock, flags); rz_dmac_disable_hw(channel); - for (i =3D 0; i < DMAC_NR_LMDESC; i++) - lmdesc[i].header =3D 0; + rz_dmac_invalidate_lmdesc(channel); =20 list_splice_tail_init(&channel->ld_active, &channel->ld_free); list_splice_tail_init(&channel->ld_queue, &channel->ld_free); --=20 2.43.0