* [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-07-30 15:20 ` Anders Roxell
0 siblings, 0 replies; 9+ messages in thread
From: Anders Roxell @ 2019-07-30 15:20 UTC (permalink / raw)
To: will, joro
Cc: linux-arm-kernel, iommu, linux-kernel, robin.murphy, Anders Roxell
Now that -Wimplicit-fallthrough is passed to GCC by default, the
following warning shows up:
../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
through [-Wimplicit-fallthrough=]
if (disable_bypass)
^
../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
default:
^~~~~~~
Rework so that the compiler doesn't warn about fall-through. Make it
clearer by calling 'BUG_ON()' when disable_bypass is set, and always
'break;'
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
drivers/iommu/arm-smmu-v3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index a9a9fabd3968..c5c93e48b4db 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
ste_live = true;
break;
case STRTAB_STE_0_CFG_ABORT:
- if (disable_bypass)
- break;
+ BUG_ON(!disable_bypass);
+ break;
default:
BUG(); /* STE corruption */
}
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-07-30 15:20 ` Anders Roxell
0 siblings, 0 replies; 9+ messages in thread
From: Anders Roxell @ 2019-07-30 15:20 UTC (permalink / raw)
To: will, joro
Cc: Anders Roxell, iommu, robin.murphy, linux-kernel, linux-arm-kernel
Now that -Wimplicit-fallthrough is passed to GCC by default, the
following warning shows up:
../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
through [-Wimplicit-fallthrough=]
if (disable_bypass)
^
../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
default:
^~~~~~~
Rework so that the compiler doesn't warn about fall-through. Make it
clearer by calling 'BUG_ON()' when disable_bypass is set, and always
'break;'
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
drivers/iommu/arm-smmu-v3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index a9a9fabd3968..c5c93e48b4db 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
ste_live = true;
break;
case STRTAB_STE_0_CFG_ABORT:
- if (disable_bypass)
- break;
+ BUG_ON(!disable_bypass);
+ break;
default:
BUG(); /* STE corruption */
}
--
2.20.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-07-30 15:20 ` Anders Roxell
0 siblings, 0 replies; 9+ messages in thread
From: Anders Roxell @ 2019-07-30 15:20 UTC (permalink / raw)
To: will, joro
Cc: Anders Roxell, iommu, robin.murphy, linux-kernel, linux-arm-kernel
Now that -Wimplicit-fallthrough is passed to GCC by default, the
following warning shows up:
../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
through [-Wimplicit-fallthrough=]
if (disable_bypass)
^
../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
default:
^~~~~~~
Rework so that the compiler doesn't warn about fall-through. Make it
clearer by calling 'BUG_ON()' when disable_bypass is set, and always
'break;'
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
drivers/iommu/arm-smmu-v3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index a9a9fabd3968..c5c93e48b4db 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
ste_live = true;
break;
case STRTAB_STE_0_CFG_ABORT:
- if (disable_bypass)
- break;
+ BUG_ON(!disable_bypass);
+ break;
default:
BUG(); /* STE corruption */
}
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
2019-07-30 15:20 ` Anders Roxell
(?)
@ 2019-07-30 15:26 ` Will Deacon
-1 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2019-07-30 15:26 UTC (permalink / raw)
To: Anders Roxell; +Cc: joro, linux-arm-kernel, iommu, linux-kernel, robin.murphy
On Tue, Jul 30, 2019 at 05:20:11PM +0200, Anders Roxell wrote:
> Now that -Wimplicit-fallthrough is passed to GCC by default, the
> following warning shows up:
>
> ../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
> ../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
> through [-Wimplicit-fallthrough=]
> if (disable_bypass)
> ^
> ../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
> default:
> ^~~~~~~
>
> Rework so that the compiler doesn't warn about fall-through. Make it
> clearer by calling 'BUG_ON()' when disable_bypass is set, and always
> 'break;'
>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> ---
> drivers/iommu/arm-smmu-v3.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index a9a9fabd3968..c5c93e48b4db 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
> ste_live = true;
> break;
> case STRTAB_STE_0_CFG_ABORT:
> - if (disable_bypass)
> - break;
> + BUG_ON(!disable_bypass);
> + break;
> default:
> BUG(); /* STE corruption */
> }
> --
> 2.20.1
Acked-by: Will Deacon <will@kernel.org>
Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
include it in my pull request for 5.4.
Cheers,
Will
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-07-30 15:26 ` Will Deacon
0 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2019-07-30 15:26 UTC (permalink / raw)
To: Anders Roxell; +Cc: robin.murphy, iommu, linux-arm-kernel, linux-kernel
On Tue, Jul 30, 2019 at 05:20:11PM +0200, Anders Roxell wrote:
> Now that -Wimplicit-fallthrough is passed to GCC by default, the
> following warning shows up:
>
> ../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
> ../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
> through [-Wimplicit-fallthrough=]
> if (disable_bypass)
> ^
> ../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
> default:
> ^~~~~~~
>
> Rework so that the compiler doesn't warn about fall-through. Make it
> clearer by calling 'BUG_ON()' when disable_bypass is set, and always
> 'break;'
>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> ---
> drivers/iommu/arm-smmu-v3.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index a9a9fabd3968..c5c93e48b4db 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
> ste_live = true;
> break;
> case STRTAB_STE_0_CFG_ABORT:
> - if (disable_bypass)
> - break;
> + BUG_ON(!disable_bypass);
> + break;
> default:
> BUG(); /* STE corruption */
> }
> --
> 2.20.1
Acked-by: Will Deacon <will@kernel.org>
Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
include it in my pull request for 5.4.
Cheers,
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-07-30 15:26 ` Will Deacon
0 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2019-07-30 15:26 UTC (permalink / raw)
To: Anders Roxell; +Cc: joro, robin.murphy, iommu, linux-arm-kernel, linux-kernel
On Tue, Jul 30, 2019 at 05:20:11PM +0200, Anders Roxell wrote:
> Now that -Wimplicit-fallthrough is passed to GCC by default, the
> following warning shows up:
>
> ../drivers/iommu/arm-smmu-v3.c: In function ‘arm_smmu_write_strtab_ent’:
> ../drivers/iommu/arm-smmu-v3.c:1189:7: warning: this statement may fall
> through [-Wimplicit-fallthrough=]
> if (disable_bypass)
> ^
> ../drivers/iommu/arm-smmu-v3.c:1191:3: note: here
> default:
> ^~~~~~~
>
> Rework so that the compiler doesn't warn about fall-through. Make it
> clearer by calling 'BUG_ON()' when disable_bypass is set, and always
> 'break;'
>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> ---
> drivers/iommu/arm-smmu-v3.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index a9a9fabd3968..c5c93e48b4db 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -1186,8 +1186,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
> ste_live = true;
> break;
> case STRTAB_STE_0_CFG_ABORT:
> - if (disable_bypass)
> - break;
> + BUG_ON(!disable_bypass);
> + break;
> default:
> BUG(); /* STE corruption */
> }
> --
> 2.20.1
Acked-by: Will Deacon <will@kernel.org>
Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
include it in my pull request for 5.4.
Cheers,
Will
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
2019-07-30 15:26 ` Will Deacon
(?)
@ 2019-08-06 15:28 ` Joerg Roedel
-1 siblings, 0 replies; 9+ messages in thread
From: Joerg Roedel @ 2019-08-06 15:28 UTC (permalink / raw)
To: Will Deacon
Cc: Anders Roxell, linux-arm-kernel, iommu, linux-kernel, robin.murphy
On Tue, Jul 30, 2019 at 04:26:01PM +0100, Will Deacon wrote:
> Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
> include it in my pull request for 5.4.
Applied to iommu/fixes, thanks.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-08-06 15:28 ` Joerg Roedel
0 siblings, 0 replies; 9+ messages in thread
From: Joerg Roedel @ 2019-08-06 15:28 UTC (permalink / raw)
To: Will Deacon
Cc: robin.murphy, iommu, Anders Roxell, linux-kernel, linux-arm-kernel
On Tue, Jul 30, 2019 at 04:26:01PM +0100, Will Deacon wrote:
> Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
> include it in my pull request for 5.4.
Applied to iommu/fixes, thanks.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through
@ 2019-08-06 15:28 ` Joerg Roedel
0 siblings, 0 replies; 9+ messages in thread
From: Joerg Roedel @ 2019-08-06 15:28 UTC (permalink / raw)
To: Will Deacon
Cc: robin.murphy, iommu, Anders Roxell, linux-kernel, linux-arm-kernel
On Tue, Jul 30, 2019 at 04:26:01PM +0100, Will Deacon wrote:
> Joerg -- if you'd like to pick this up as a fix, feel free, otherwise I'll
> include it in my pull request for 5.4.
Applied to iommu/fixes, thanks.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-08-06 15:28 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-30 15:20 [PATCH v2] iommu: arm-smmu-v3: Mark expected switch fall-through Anders Roxell
2019-07-30 15:20 ` Anders Roxell
2019-07-30 15:20 ` Anders Roxell
2019-07-30 15:26 ` Will Deacon
2019-07-30 15:26 ` Will Deacon
2019-07-30 15:26 ` Will Deacon
2019-08-06 15:28 ` Joerg Roedel
2019-08-06 15:28 ` Joerg Roedel
2019-08-06 15:28 ` Joerg Roedel
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