[PATCH v3] ahci: qoriq: fixed using uninitialized variable warnings

[PATCH v3] ahci: qoriq: fixed using uninitialized variable warnings

[Yuantian.Tang]

From: Tang Yuantian <Yuantian.Tang@freescale.com>

kbuild test robot reports the warnings:
drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
>> include/asm-generic/io.h:163:2: warning: 'px_is' may be used
>> uninitialized in this function [-Wuninitialized]
drivers/ata/ahci_qoriq.c:70:14: note: 'px_is' was declared here
>> include/asm-generic/io.h:163:2: warning: 'px_cmd' may be used
>> uninitialized in this function [-Wuninitialized]
drivers/ata/ahci_qoriq.c:70:6: note: 'px_cmd' was declared here

This is caused by openrisc arch's compiler. This driver is for
QorIQ ARM platforms. So add the dependency on ARM to remove
these warnings.

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
---
v3:
	- fix it by in a new way
v2:
	- try another way to fix the warnings
	- remove clean up code

 drivers/ata/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 6aaa3f8..a830344 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -177,7 +177,7 @@ config AHCI_XGENE
 
 config AHCI_QORIQ
 	tristate "Freescale QorIQ AHCI SATA support"
-	depends on OF
+	depends on OF && ARM
 	help
 	  This option enables support for the Freescale QorIQ AHCI SoC's
 	  onboard AHCI SATA.
-- 
2.1.0.27.g96db324

RE: [PATCH v3] ahci: qoriq: fixed using uninitialized variable warnings

[Yuantian Tang]

Hi Tejun, Fengguang,

Please help to verify if this patch can remove the warnings.

Thanks,
Yuantian

> -----Original Message-----
> From: Yuantian.Tang@freescale.com [mailto:Yuantian.Tang@freescale.com]
> Sent: Monday, September 14, 2015 3:13 PM
> To: hdegoede@redhat.com
> Cc: tj@kernel.org; fengguang.wu@intel.com; linux-ide@vger.kernel.org;
> linux-kernel@vger.kernel.org; Tang Yuantian-B29983
> <Yuantian.Tang@freescale.com>
> Subject: [PATCH v3] ahci: qoriq: fixed using uninitialized variable warnings
> 
> From: Tang Yuantian <Yuantian.Tang@freescale.com>
> 
> kbuild test robot reports the warnings:
> drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
> >> include/asm-generic/io.h:163:2: warning: 'px_is' may be used
> >> uninitialized in this function [-Wuninitialized]
> drivers/ata/ahci_qoriq.c:70:14: note: 'px_is' was declared here
> >> include/asm-generic/io.h:163:2: warning: 'px_cmd' may be used
> >> uninitialized in this function [-Wuninitialized]
> drivers/ata/ahci_qoriq.c:70:6: note: 'px_cmd' was declared here
> 
> This is caused by openrisc arch's compiler. This driver is for QorIQ ARM
> platforms. So add the dependency on ARM to remove these warnings.
> 
> Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
> ---
> v3:
> 	- fix it by in a new way
> v2:
> 	- try another way to fix the warnings
> 	- remove clean up code
> 
>  drivers/ata/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 6aaa3f8..a830344
> 100644
> --- a/drivers/ata/Kconfig
> +++ b/drivers/ata/Kconfig
> @@ -177,7 +177,7 @@ config AHCI_XGENE
> 
>  config AHCI_QORIQ
>  	tristate "Freescale QorIQ AHCI SATA support"
> -	depends on OF
> +	depends on OF && ARM
>  	help
>  	  This option enables support for the Freescale QorIQ AHCI SoC's
>  	  onboard AHCI SATA.
> --
> 2.1.0.27.g96db324