dmaengine: ste_dma40: 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>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201027215252.25820-10-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 77ab1f4730be917707fb4646f9602c6f91ca0e57..4256e55bbf25ff15ad7027796aa98738b4f62138 100644 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1643,13 +1643,12 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data)
        u32 row;
        long chan = -1;
        struct d40_chan *d40c;
-       unsigned long flags;
        struct d40_base *base = data;
        u32 *regs = base->regs_interrupt;
        struct d40_interrupt_lookup *il = base->gen_dmac.il;
        u32 il_size = base->gen_dmac.il_size;
 
-       spin_lock_irqsave(&base->interrupt_lock, flags);
+       spin_lock(&base->interrupt_lock);
 
        /* Read interrupt status of both logical and physical channels */
        for (i = 0; i < il_size; i++)
@@ -1694,7 +1693,7 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data)
                spin_unlock(&d40c->lock);
        }
 
-       spin_unlock_irqrestore(&base->interrupt_lock, flags);
+       spin_unlock(&base->interrupt_lock);
 
        return IRQ_HANDLED;
 }