2021-11-29 16:12:45

by Nathan Chancellor

Subject: [PATCH] fpga: stratix10-soc: Do not use ret uninitialized in s10_probe()

Clang warns:

drivers/fpga/stratix10-soc.c:431:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
return ret;
^~~
drivers/fpga/stratix10-soc.c:402:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
1 warning generated.

ret is only assigned in an error path now so just return 0 directly.

Fixes: 4ba0b2c294fe ("fpga: mgr: Use standard dev_release for class driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/1517
Signed-off-by: Nathan Chancellor <[email protected]>
---
drivers/fpga/stratix10-soc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
index 737d14c6e0de..357cea58ec98 100644
--- a/drivers/fpga/stratix10-soc.c
+++ b/drivers/fpga/stratix10-soc.c
@@ -428,7 +428,7 @@ static int s10_probe(struct platform_device *pdev)
}

platform_set_drvdata(pdev, mgr);
- return ret;
+ return 0;

probe_err:
stratix10_svc_free_channel(priv->chan);

base-commit: 8886a579744fbfa53e69aa453ed10ae3b1f9abac
--
2.34.1

2021-11-29 16:37:52

by Tom Rix

Subject: Re: [PATCH] fpga: stratix10-soc: Do not use ret uninitialized in s10_probe()

On 11/29/21 8:10 AM, Nathan Chancellor wrote:
> Clang warns:
>
> drivers/fpga/stratix10-soc.c:431:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
> return ret;
> ^~~
> drivers/fpga/stratix10-soc.c:402:9: note: initialize the variable 'ret' to silence this warning
> int ret;
> ^
> = 0

This line to contradicts what you did, to reduce confusion, remove the
'silence this warning line'

Change itself looks fine.

Reviewed-by: Tom Rix <[email protected]>

> 1 warning generated.
>
> ret is only assigned in an error path now so just return 0 directly.
>
> Fixes: 4ba0b2c294fe ("fpga: mgr: Use standard dev_release for class driver")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1517
> Signed-off-by: Nathan Chancellor <[email protected]>
> ---
> drivers/fpga/stratix10-soc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index 737d14c6e0de..357cea58ec98 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -428,7 +428,7 @@ static int s10_probe(struct platform_device *pdev)
> }
>
> platform_set_drvdata(pdev, mgr);
> - return ret;
> + return 0;
>
> probe_err:
> stratix10_svc_free_channel(priv->chan);
>
> base-commit: 8886a579744fbfa53e69aa453ed10ae3b1f9abac

2021-11-29 19:32:43

by Russ Weight

Subject: Re: [PATCH] fpga: stratix10-soc: Do not use ret uninitialized in s10_probe()

Reviewed-by: Russ Weight <[email protected]>

Thanks,
- Russ

On 11/29/21 8:10 AM, Nathan Chancellor wrote:
> Clang warns:
>
> drivers/fpga/stratix10-soc.c:431:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
> return ret;
> ^~~
> drivers/fpga/stratix10-soc.c:402:9: note: initialize the variable 'ret' to silence this warning
> int ret;
> ^
> = 0
> 1 warning generated.
>
> ret is only assigned in an error path now so just return 0 directly.
>
> Fixes: 4ba0b2c294fe ("fpga: mgr: Use standard dev_release for class driver")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1517
> Signed-off-by: Nathan Chancellor <[email protected]>
> ---
> drivers/fpga/stratix10-soc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index 737d14c6e0de..357cea58ec98 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -428,7 +428,7 @@ static int s10_probe(struct platform_device *pdev)
> }
>
> platform_set_drvdata(pdev, mgr);
> - return ret;
> + return 0;
>
> probe_err:
> stratix10_svc_free_channel(priv->chan);
>
> base-commit: 8886a579744fbfa53e69aa453ed10ae3b1f9abac