From: Sean Anderson <sean.anderson@linux.dev> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Vinod Koul <vkoul@kernel.org>, dmaengine@vger.kernel.org Cc: Michal Simek <michal.simek@amd.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sean Anderson <sean.anderson@linux.dev> Subject: [PATCH 2/3] dma: xilinx_dpdma: Remove unnecessary use of irqsave/restore Date: Fri, 8 Mar 2024 16:00:33 -0500 [thread overview] Message-ID: <20240308210034.3634938-3-sean.anderson@linux.dev> (raw) In-Reply-To: <20240308210034.3634938-1-sean.anderson@linux.dev> xilinx_dpdma_chan_done_irq and xilinx_dpdma_chan_vsync_irq are always called with IRQs disabled from xilinx_dpdma_irq_handler. Therefore we don't need to save/restore the IRQ flags. Signed-off-by: Sean Anderson <sean.anderson@linux.dev> --- drivers/dma/xilinx/xilinx_dpdma.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c index eb0637d90342..36bd4825d389 100644 --- a/drivers/dma/xilinx/xilinx_dpdma.c +++ b/drivers/dma/xilinx/xilinx_dpdma.c @@ -1043,9 +1043,8 @@ static int xilinx_dpdma_chan_stop(struct xilinx_dpdma_chan *chan) static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan) { struct xilinx_dpdma_tx_desc *active; - unsigned long flags; - spin_lock_irqsave(&chan->lock, flags); + spin_lock(&chan->lock); xilinx_dpdma_debugfs_desc_done_irq(chan); @@ -1057,7 +1056,7 @@ static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan) "chan%u: DONE IRQ with no active descriptor!\n", chan->id); - spin_unlock_irqrestore(&chan->lock, flags); + spin_unlock(&chan->lock); } /** @@ -1072,10 +1071,9 @@ static void xilinx_dpdma_chan_vsync_irq(struct xilinx_dpdma_chan *chan) { struct xilinx_dpdma_tx_desc *pending; struct xilinx_dpdma_sw_desc *sw_desc; - unsigned long flags; u32 desc_id; - spin_lock_irqsave(&chan->lock, flags); + spin_lock(&chan->lock); pending = chan->desc.pending; if (!chan->running || !pending) @@ -1108,7 +1106,7 @@ static void xilinx_dpdma_chan_vsync_irq(struct xilinx_dpdma_chan *chan) spin_unlock(&chan->vchan.lock); out: - spin_unlock_irqrestore(&chan->lock, flags); + spin_unlock(&chan->lock); } /** -- 2.35.1.1320.gc452695387.dirty
WARNING: multiple messages have this Message-ID (diff)
From: Sean Anderson <sean.anderson@linux.dev> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Vinod Koul <vkoul@kernel.org>, dmaengine@vger.kernel.org Cc: Michal Simek <michal.simek@amd.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sean Anderson <sean.anderson@linux.dev> Subject: [PATCH 2/3] dma: xilinx_dpdma: Remove unnecessary use of irqsave/restore Date: Fri, 8 Mar 2024 16:00:33 -0500 [thread overview] Message-ID: <20240308210034.3634938-3-sean.anderson@linux.dev> (raw) In-Reply-To: <20240308210034.3634938-1-sean.anderson@linux.dev> xilinx_dpdma_chan_done_irq and xilinx_dpdma_chan_vsync_irq are always called with IRQs disabled from xilinx_dpdma_irq_handler. Therefore we don't need to save/restore the IRQ flags. Signed-off-by: Sean Anderson <sean.anderson@linux.dev> --- drivers/dma/xilinx/xilinx_dpdma.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c index eb0637d90342..36bd4825d389 100644 --- a/drivers/dma/xilinx/xilinx_dpdma.c +++ b/drivers/dma/xilinx/xilinx_dpdma.c @@ -1043,9 +1043,8 @@ static int xilinx_dpdma_chan_stop(struct xilinx_dpdma_chan *chan) static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan) { struct xilinx_dpdma_tx_desc *active; - unsigned long flags; - spin_lock_irqsave(&chan->lock, flags); + spin_lock(&chan->lock); xilinx_dpdma_debugfs_desc_done_irq(chan); @@ -1057,7 +1056,7 @@ static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan) "chan%u: DONE IRQ with no active descriptor!\n", chan->id); - spin_unlock_irqrestore(&chan->lock, flags); + spin_unlock(&chan->lock); } /** @@ -1072,10 +1071,9 @@ static void xilinx_dpdma_chan_vsync_irq(struct xilinx_dpdma_chan *chan) { struct xilinx_dpdma_tx_desc *pending; struct xilinx_dpdma_sw_desc *sw_desc; - unsigned long flags; u32 desc_id; - spin_lock_irqsave(&chan->lock, flags); + spin_lock(&chan->lock); pending = chan->desc.pending; if (!chan->running || !pending) @@ -1108,7 +1106,7 @@ static void xilinx_dpdma_chan_vsync_irq(struct xilinx_dpdma_chan *chan) spin_unlock(&chan->vchan.lock); out: - spin_unlock_irqrestore(&chan->lock, flags); + spin_unlock(&chan->lock); } /** -- 2.35.1.1320.gc452695387.dirty _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-03-08 21:00 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-08 21:00 [PATCH 0/3] dma: xilinx_dpdma: Fix locking Sean Anderson 2024-03-08 21:00 ` Sean Anderson 2024-03-08 21:00 ` [PATCH 1/3] " Sean Anderson 2024-03-08 21:00 ` Sean Anderson 2024-03-27 11:57 ` Tomi Valkeinen 2024-03-27 11:57 ` Tomi Valkeinen 2024-03-08 21:00 ` Sean Anderson [this message] 2024-03-08 21:00 ` [PATCH 2/3] dma: xilinx_dpdma: Remove unnecessary use of irqsave/restore Sean Anderson 2024-03-27 12:27 ` Tomi Valkeinen 2024-03-27 12:27 ` Tomi Valkeinen 2024-03-28 15:00 ` Sean Anderson 2024-03-28 15:00 ` Sean Anderson 2024-03-28 16:37 ` Tomi Valkeinen 2024-03-28 16:37 ` Tomi Valkeinen 2024-03-08 21:00 ` [PATCH 3/3] dma: Add lockdep asserts to virt-dma Sean Anderson 2024-03-08 21:00 ` Sean Anderson 2024-03-27 12:29 ` Tomi Valkeinen 2024-03-27 12:29 ` Tomi Valkeinen 2024-04-07 16:38 ` [PATCH 0/3] dma: xilinx_dpdma: Fix locking Vinod Koul 2024-04-07 16:38 ` Vinod Koul
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