A BAR size is always a power of two. buf_size = min(SZ_1M, bar_size);
If the BAR size is <= 1MB, there will be 1 iteration, no remainder. If
the BAR size is > 1MB, there will be more than one iteration, but the
size will always be evenly divisible by 1MB, so no remainder.

Signed-off-by: Hans Zhang <18255117159@163.com>
Suggested-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/misc/pci_endpoint_test.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 3aaaf47fa4ee..0e68dfa7257a 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -313,12 +313,6 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
 						 write_buf, read_buf, buf_size))
 			return false;
 
-	remain = bar_size % buf_size;
-	if (remain)
-		if (pci_endpoint_test_bar_memcmp(test, barno, buf_size * iters,
-						 write_buf, read_buf, remain))
-			return false;
-
 	return true;
 }
 
-- 
2.25.1

On Wed, Jan 08, 2025 at 03:25:03PM +0800, Hans Zhang wrote:
> A BAR size is always a power of two. buf_size = min(SZ_1M, bar_size);
> If the BAR size is <= 1MB, there will be 1 iteration, no remainder. If
> the BAR size is > 1MB, there will be more than one iteration, but the
> size will always be evenly divisible by 1MB, so no remainder.
> 
> Signed-off-by: Hans Zhang <18255117159@163.com>
> Suggested-by: Niklas Cassel <cassel@kernel.org>
> ---
>  drivers/misc/pci_endpoint_test.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
> index 3aaaf47fa4ee..0e68dfa7257a 100644
> --- a/drivers/misc/pci_endpoint_test.c
> +++ b/drivers/misc/pci_endpoint_test.c
> @@ -313,12 +313,6 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
>  						 write_buf, read_buf, buf_size))
>  			return false;
>  
> -	remain = bar_size % buf_size;
> -	if (remain)
> -		if (pci_endpoint_test_bar_memcmp(test, barno, buf_size * iters,
> -						 write_buf, read_buf, remain))
> -			return false;
> -
>  	return true;
>  }
>  
> -- 
> 2.25.1
> 

You also need to remove the remain variable declaration in this patch,
otherwise there will be a build warning when building this patch.

With that fixed:
Reviewed-by: Niklas Cassel <cassel@kernel.org>

On 2025/1/8 15:40, Niklas Cassel wrote:

> You also need to remove the remain variable declaration in this patch,
> otherwise there will be a build warning when building this patch.

Ok, I have resubmitted patch.

Best regards
Hans