* [PATCH] skd: replace spin_lock_irqsave by spin_lock in hard IRQ
@ 2020-10-21 1:16 Tian Tao
2020-10-27 4:09 ` Damien Le Moal
0 siblings, 1 reply; 2+ messages in thread
From: Tian Tao @ 2020-10-21 1:16 UTC (permalink / raw)
To: Damien.LeMoal, axboe, linux-block, linux-kernel
The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
---
drivers/block/skd_main.c | 25 ++++++++++---------------
1 file changed, 10 insertions(+), 15 deletions(-)
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index ae6454c..e80b670 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -2368,40 +2368,37 @@ static int skd_unquiesce_dev(struct skd_device *skdev)
static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data)
{
struct skd_device *skdev = skd_host_data;
- unsigned long flags;
- spin_lock_irqsave(&skdev->lock, flags);
+ spin_lock(&skdev->lock);
dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
SKD_READL(skdev, FIT_INT_STATUS_HOST));
dev_err(&skdev->pdev->dev, "MSIX reserved irq %d = 0x%x\n", irq,
SKD_READL(skdev, FIT_INT_STATUS_HOST));
SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST);
- spin_unlock_irqrestore(&skdev->lock, flags);
+ spin_unlock(&skdev->lock);
return IRQ_HANDLED;
}
static irqreturn_t skd_statec_isr(int irq, void *skd_host_data)
{
struct skd_device *skdev = skd_host_data;
- unsigned long flags;
- spin_lock_irqsave(&skdev->lock, flags);
+ spin_lock(&skdev->lock);
dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
SKD_READL(skdev, FIT_INT_STATUS_HOST));
SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST);
skd_isr_fwstate(skdev);
- spin_unlock_irqrestore(&skdev->lock, flags);
+ spin_unlock(&skdev->lock);
return IRQ_HANDLED;
}
static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
{
struct skd_device *skdev = skd_host_data;
- unsigned long flags;
int flush_enqueued = 0;
int deferred;
- spin_lock_irqsave(&skdev->lock, flags);
+ spin_lock(&skdev->lock);
dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
SKD_READL(skdev, FIT_INT_STATUS_HOST));
SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST);
@@ -2415,7 +2412,7 @@ static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
else if (!flush_enqueued)
schedule_work(&skdev->start_queue);
- spin_unlock_irqrestore(&skdev->lock, flags);
+ spin_unlock(&skdev->lock);
return IRQ_HANDLED;
}
@@ -2423,27 +2420,25 @@ static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
static irqreturn_t skd_msg_isr(int irq, void *skd_host_data)
{
struct skd_device *skdev = skd_host_data;
- unsigned long flags;
- spin_lock_irqsave(&skdev->lock, flags);
+ spin_lock(&skdev->lock);
dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
SKD_READL(skdev, FIT_INT_STATUS_HOST));
SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST);
skd_isr_msg_from_dev(skdev);
- spin_unlock_irqrestore(&skdev->lock, flags);
+ spin_unlock(&skdev->lock);
return IRQ_HANDLED;
}
static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data)
{
struct skd_device *skdev = skd_host_data;
- unsigned long flags;
- spin_lock_irqsave(&skdev->lock, flags);
+ spin_lock(&skdev->lock);
dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
SKD_READL(skdev, FIT_INT_STATUS_HOST));
SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST);
- spin_unlock_irqrestore(&skdev->lock, flags);
+ spin_unlock(&skdev->lock);
return IRQ_HANDLED;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] skd: replace spin_lock_irqsave by spin_lock in hard IRQ
2020-10-21 1:16 [PATCH] skd: replace spin_lock_irqsave by spin_lock in hard IRQ Tian Tao
@ 2020-10-27 4:09 ` Damien Le Moal
0 siblings, 0 replies; 2+ messages in thread
From: Damien Le Moal @ 2020-10-27 4:09 UTC (permalink / raw)
To: Tian Tao, axboe, linux-block
On 2020/10/21 10:16, Tian Tao wrote:
> The code has been in a irq-disabled context since it is hard IRQ. There
> is no necessity to do it again.
>
> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
> ---
> drivers/block/skd_main.c | 25 ++++++++++---------------
> 1 file changed, 10 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
> index ae6454c..e80b670 100644
> --- a/drivers/block/skd_main.c
> +++ b/drivers/block/skd_main.c
> @@ -2368,40 +2368,37 @@ static int skd_unquiesce_dev(struct skd_device *skdev)
> static irqreturn_t skd_reserved_isr(int irq, void *skd_host_data)
> {
> struct skd_device *skdev = skd_host_data;
> - unsigned long flags;
>
> - spin_lock_irqsave(&skdev->lock, flags);
> + spin_lock(&skdev->lock);
> dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> dev_err(&skdev->pdev->dev, "MSIX reserved irq %d = 0x%x\n", irq,
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> SKD_WRITEL(skdev, FIT_INT_RESERVED_MASK, FIT_INT_STATUS_HOST);
> - spin_unlock_irqrestore(&skdev->lock, flags);
> + spin_unlock(&skdev->lock);
> return IRQ_HANDLED;
> }
>
> static irqreturn_t skd_statec_isr(int irq, void *skd_host_data)
> {
> struct skd_device *skdev = skd_host_data;
> - unsigned long flags;
>
> - spin_lock_irqsave(&skdev->lock, flags);
> + spin_lock(&skdev->lock);
> dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> SKD_WRITEL(skdev, FIT_ISH_FW_STATE_CHANGE, FIT_INT_STATUS_HOST);
> skd_isr_fwstate(skdev);
> - spin_unlock_irqrestore(&skdev->lock, flags);
> + spin_unlock(&skdev->lock);
> return IRQ_HANDLED;
> }
>
> static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
> {
> struct skd_device *skdev = skd_host_data;
> - unsigned long flags;
> int flush_enqueued = 0;
> int deferred;
>
> - spin_lock_irqsave(&skdev->lock, flags);
> + spin_lock(&skdev->lock);
> dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> SKD_WRITEL(skdev, FIT_ISH_COMPLETION_POSTED, FIT_INT_STATUS_HOST);
> @@ -2415,7 +2412,7 @@ static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
> else if (!flush_enqueued)
> schedule_work(&skdev->start_queue);
>
> - spin_unlock_irqrestore(&skdev->lock, flags);
> + spin_unlock(&skdev->lock);
>
> return IRQ_HANDLED;
> }
> @@ -2423,27 +2420,25 @@ static irqreturn_t skd_comp_q(int irq, void *skd_host_data)
> static irqreturn_t skd_msg_isr(int irq, void *skd_host_data)
> {
> struct skd_device *skdev = skd_host_data;
> - unsigned long flags;
>
> - spin_lock_irqsave(&skdev->lock, flags);
> + spin_lock(&skdev->lock);
> dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> SKD_WRITEL(skdev, FIT_ISH_MSG_FROM_DEV, FIT_INT_STATUS_HOST);
> skd_isr_msg_from_dev(skdev);
> - spin_unlock_irqrestore(&skdev->lock, flags);
> + spin_unlock(&skdev->lock);
> return IRQ_HANDLED;
> }
>
> static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data)
> {
> struct skd_device *skdev = skd_host_data;
> - unsigned long flags;
>
> - spin_lock_irqsave(&skdev->lock, flags);
> + spin_lock(&skdev->lock);
> dev_dbg(&skdev->pdev->dev, "MSIX = 0x%x\n",
> SKD_READL(skdev, FIT_INT_STATUS_HOST));
> SKD_WRITEL(skdev, FIT_INT_QUEUE_FULL, FIT_INT_STATUS_HOST);
> - spin_unlock_irqrestore(&skdev->lock, flags);
> + spin_unlock(&skdev->lock);
> return IRQ_HANDLED;
> }
>
>
Looks OK to me.
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
--
Damien Le Moal
Western Digital Research
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-10-21 1:16 [PATCH] skd: replace spin_lock_irqsave by spin_lock in hard IRQ Tian Tao
2020-10-27 4:09 ` Damien Le Moal
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