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iommu: dart: DART_T8110_ERROR range should be 0 to 5

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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: d8bcc870d9 ("iommu: dart: Add t8110 DART support")
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20230201124257.7801-1-ecurtin@redhat.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Eric Curtin 2023-02-01 12:42:58 +00:00 committed by Joerg Roedel
parent cf5c1c87c2
commit 9e6a1825ac
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/apple-dart.c
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@ -111,8 +111,8 @@
#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)