* [PATCH] iommu: dart: DART_T8110_ERROR range should be 0 to 5
@ 2023-01-30 16:53 Eric Curtin
2023-01-30 18:16 ` Sven Peter
0 siblings, 1 reply; 2+ messages in thread
From: Eric Curtin @ 2023-01-30 16:53 UTC (permalink / raw)
To: asahi
Cc: Eric Curtin, Dan Carpenter, Hector Martin, Sven Peter,
Alyssa Rosenzweig, Joerg Roedel, Will Deacon, Robin Murphy,
moderated list:ARM/APPLE MACHINE SUPPORT,
open list:IOMMU SUBSYSTEM, open list
This was detected by smatch as one "else if" statement could never be
reached. Confirmed bit order by comparing with python implementation [1].
drivers/iommu/apple-dart.c:991 apple_dart_t8110_irq()
warn: duplicate check 'error_code == ((((1))) << (3))'
(previous on line 989)
Link: https://github.com/AsahiLinux/m1n1/commit/96b2d584feec1e3f7bfa [1]
Fixes: d8bcc870d99d ("iommu: dart: Add t8110 DART support")
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Eric Curtin <ecurtin@redhat.com>
---
drivers/iommu/apple-dart.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index efe877842f72..3adacf4094d7 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -112,15 +112,15 @@
#define DART_T8110_ERROR_MASK 0x104
-#define DART_T8110_ERROR_READ_FAULT BIT(4)
-#define DART_T8110_ERROR_WRITE_FAULT BIT(3)
+#define DART_T8110_ERROR_READ_FAULT BIT(5)
+#define DART_T8110_ERROR_WRITE_FAULT BIT(4)
#define DART_T8110_ERROR_NO_PTE BIT(3)
#define DART_T8110_ERROR_NO_PMD BIT(2)
#define DART_T8110_ERROR_NO_PGD BIT(1)
#define DART_T8110_ERROR_NO_TTBR BIT(0)
#define DART_T8110_ERROR_ADDR_LO 0x170
-#define DART_T8110_ERROR_ADDR_HI 0x174
+#define DART_T8110_ERROR_ADDR_HI 0x175
#define DART_T8110_PROTECT 0x200
#define DART_T8110_UNPROTECT 0x204
--
2.39.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] iommu: dart: DART_T8110_ERROR range should be 0 to 5
2023-01-30 16:53 [PATCH] iommu: dart: DART_T8110_ERROR range should be 0 to 5 Eric Curtin
@ 2023-01-30 18:16 ` Sven Peter
0 siblings, 0 replies; 2+ messages in thread
From: Sven Peter @ 2023-01-30 18:16 UTC (permalink / raw)
To: Eric Curtin, asahi
Cc: Dan Carpenter, Hector Martin, Alyssa Rosenzweig, Joerg Roedel,
Will Deacon, Robin Murphy,
moderated list:ARM/APPLE MACHINE SUPPORT,
open list:IOMMU SUBSYSTEM, open list
Hi,
On Mon, Jan 30, 2023, at 17:53, Eric Curtin wrote:
> This was detected by smatch as one "else if" statement could never be
> reached. Confirmed bit order by comparing with python implementation [1].
>
> drivers/iommu/apple-dart.c:991 apple_dart_t8110_irq()
> warn: duplicate check 'error_code == ((((1))) << (3))'
> (previous on line 989)
>
> Link: https://github.com/AsahiLinux/m1n1/commit/96b2d584feec1e3f7bfa [1]
>
> Fixes: d8bcc870d99d ("iommu: dart: Add t8110 DART support")
> Reported-by: Dan Carpenter <error27@gmail.com>
> Signed-off-by: Eric Curtin <ecurtin@redhat.com>
> ---
> drivers/iommu/apple-dart.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
> index efe877842f72..3adacf4094d7 100644
> --- a/drivers/iommu/apple-dart.c
> +++ b/drivers/iommu/apple-dart.c
> @@ -112,15 +112,15 @@
>
> #define DART_T8110_ERROR_MASK 0x104
>
> -#define DART_T8110_ERROR_READ_FAULT BIT(4)
> -#define DART_T8110_ERROR_WRITE_FAULT BIT(3)
> +#define DART_T8110_ERROR_READ_FAULT BIT(5)
> +#define DART_T8110_ERROR_WRITE_FAULT BIT(4)
this looks good!
> #define DART_T8110_ERROR_NO_PTE BIT(3)
> #define DART_T8110_ERROR_NO_PMD BIT(2)
> #define DART_T8110_ERROR_NO_PGD BIT(1)
> #define DART_T8110_ERROR_NO_TTBR BIT(0)
>
> #define DART_T8110_ERROR_ADDR_LO 0x170
> -#define DART_T8110_ERROR_ADDR_HI 0x174
> +#define DART_T8110_ERROR_ADDR_HI 0x175
this doesn't. 0x174 already is the correct offset.
Thanks,
Sven
^ permalink raw reply [flat|nested] 2+ messages in thread
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