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| author | Barry Song <song.bao.hua@hisilicon.com> | 2020-10-28 10:52:44 +1300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-11-09 17:25:53 +0530 |
| commit | e991c06ed714c64d3d79696513370f894a4ab751 (patch) | |
| tree | 3c7d01eaea26dfd2ec93c63f3c23a4ab17d12b6f /drivers/dma | |
| parent | f3b1024908ec02d7af4d01a2659901828844bdd2 (diff) | |
| download | linux-e991c06ed714c64d3d79696513370f894a4ab751.tar.gz linux-e991c06ed714c64d3d79696513370f894a4ab751.tar.bz2 linux-e991c06ed714c64d3d79696513370f894a4ab751.zip | |
dmaengine: ti: k3-udma: remove redundant irqsave and irqrestore in hardIRQ
Running in hardIRQ, disabling IRQ is redundant since hardIRQ has disabled
IRQ. This patch removes the irqsave and irqstore to save some instruction
cycles.
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201027215252.25820-3-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/ti/k3-udma.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 82cf6c77f5c9..e508280b3d70 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -1020,13 +1020,12 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data) { struct udma_chan *uc = data; struct udma_desc *d; - unsigned long flags; dma_addr_t paddr = 0; if (udma_pop_from_ring(uc, &paddr) || !paddr) return IRQ_HANDLED; - spin_lock_irqsave(&uc->vc.lock, flags); + spin_lock(&uc->vc.lock); /* Teardown completion message */ if (cppi5_desc_is_tdcm(paddr)) { @@ -1077,7 +1076,7 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data) } } out: - spin_unlock_irqrestore(&uc->vc.lock, flags); + spin_unlock(&uc->vc.lock); return IRQ_HANDLED; } @@ -1086,9 +1085,8 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data) { struct udma_chan *uc = data; struct udma_desc *d; - unsigned long flags; - spin_lock_irqsave(&uc->vc.lock, flags); + spin_lock(&uc->vc.lock); d = uc->desc; if (d) { d->tr_idx = (d->tr_idx + 1) % d->sglen; @@ -1103,7 +1101,7 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data) } } - spin_unlock_irqrestore(&uc->vc.lock, flags); + spin_unlock(&uc->vc.lock); return IRQ_HANDLED; } |