linux-kernel - Re: [PATCH v2 2/5] tools: PCI: Fix parsing the return value of IOCTLs

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Date:   Wed, 24 Aug 2022 14:44:06 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     kishon@...com, lpieralisi@...nel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, mie@...l.co.jp, kw@...ux.com,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 2/5] tools: PCI: Fix parsing the return value of IOCTLs

On Wed, Aug 24, 2022 at 06:00:07PM +0530, Manivannan Sadhasivam wrote:
> "pci_endpoint_test" driver now returns 0 for success and negative error
> code for failure. So adapt to the change by reporting FAILURE if the
> return value is < 0, and SUCCESS otherwise.
> 
> Cc: stable@...r.kernel.org #5.10
> Fixes: 3f2ed8134834 ("tools: PCI: Add a userspace tool to test PCI endpoint")
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  tools/pci/pcitest.c | 41 +++++++++++++++++++++--------------------
>  1 file changed, 21 insertions(+), 20 deletions(-)
> 
> diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
> index 441b54234635..a4e5b17cc3b5 100644
> --- a/tools/pci/pcitest.c
> +++ b/tools/pci/pcitest.c
> @@ -18,7 +18,6 @@
>  
>  #define BILLION 1E9
>  
> -static char *result[] = { "NOT OKAY", "OKAY" };
>  static char *irq[] = { "LEGACY", "MSI", "MSI-X" };
>  
>  struct pci_test {
> @@ -54,9 +53,9 @@ static int run_test(struct pci_test *test)
>  		ret = ioctl(fd, PCITEST_BAR, test->barnum);
>  		fprintf(stdout, "BAR%d:\t\t", test->barnum);
>  		if (ret < 0)
> -			fprintf(stdout, "TEST FAILED\n");
> +			fprintf(stdout, "FAILED\n");
>  		else
> -			fprintf(stdout, "%s\n", result[ret]);
> +			fprintf(stdout, "SUCCESS\n");

Is this following the kernel TAP output rules?  If not, why not?  If so,
say that you are fixing that issue up in the changelog text.

thanks,

greg k-h