[PATCH] dmaengine: idxd: remove set but unused 'rc'

[PATCH] dmaengine: idxd: remove set but unused 'rc'

[Vinod Koul]

The driver assigns result of check_vma() to rc and never checks the
result, so remove the assignment

drivers/dma/idxd/cdev.c: In function ‘idxd_cdev_mmap’:
drivers/dma/idxd/cdev.c:136:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]
  136 |  int rc;
      |      ^~

Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

Dave, if you want the result of the check_vma() to be checked, feel free to
send the patch for that

 drivers/dma/idxd/cdev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 8dfdbe37e381..82b19eed6561 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -133,10 +133,9 @@ static int idxd_cdev_mmap(struct file *filp, struct vm_area_struct *vma)
 	struct pci_dev *pdev = idxd->pdev;
 	phys_addr_t base = pci_resource_start(pdev, IDXD_WQ_BAR);
 	unsigned long pfn;
-	int rc;
 
 	dev_dbg(&pdev->dev, "%s called\n", __func__);
-	rc = check_vma(wq, vma, __func__);
+	check_vma(wq, vma, __func__);
 
 	vma->vm_flags |= VM_DONTCOPY;
 	pfn = (base + idxd_get_wq_portal_full_offset(wq->id,
-- 
2.24.1

Re: [PATCH] dmaengine: idxd: remove set but unused 'rc'

[Dave Jiang]

On 2/25/20 1:14 AM, Vinod Koul wrote:
> The driver assigns result of check_vma() to rc and never checks the
> result, so remove the assignment
> 
> drivers/dma/idxd/cdev.c: In function ‘idxd_cdev_mmap’:
> drivers/dma/idxd/cdev.c:136:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]
>    136 |  int rc;
>        |      ^~
> 
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
> 
> Dave, if you want the result of the check_vma() to be checked, feel free to
> send the patch for that

Yes I will send a fix. Mistake from several code merges. Oops.

> 
>   drivers/dma/idxd/cdev.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
> index 8dfdbe37e381..82b19eed6561 100644
> --- a/drivers/dma/idxd/cdev.c
> +++ b/drivers/dma/idxd/cdev.c
> @@ -133,10 +133,9 @@ static int idxd_cdev_mmap(struct file *filp, struct vm_area_struct *vma)
>   	struct pci_dev *pdev = idxd->pdev;
>   	phys_addr_t base = pci_resource_start(pdev, IDXD_WQ_BAR);
>   	unsigned long pfn;
> -	int rc;
>   
>   	dev_dbg(&pdev->dev, "%s called\n", __func__);
> -	rc = check_vma(wq, vma, __func__);
> +	check_vma(wq, vma, __func__);
>   
>   	vma->vm_flags |= VM_DONTCOPY;
>   	pfn = (base + idxd_get_wq_portal_full_offset(wq->id,
> 

Re: [PATCH] dmaengine: idxd: remove set but unused 'rc'

[Vinod Koul]

On 25-02-20, 09:14, Dave Jiang wrote:
> 
> 
> On 2/25/20 1:14 AM, Vinod Koul wrote:
> > The driver assigns result of check_vma() to rc and never checks the
> > result, so remove the assignment
> > 
> > drivers/dma/idxd/cdev.c: In function ‘idxd_cdev_mmap’:
> > drivers/dma/idxd/cdev.c:136:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]
> >    136 |  int rc;
> >        |      ^~
> > 
> > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > ---
> > 
> > Dave, if you want the result of the check_vma() to be checked, feel free to
> > send the patch for that
> 
> Yes I will send a fix. Mistake from several code merges. Oops.

Ok, no issues
-- 
~Vinod