[PATCH v2 02/10] xen/arm: smmuv3: Fix endianness annotations

[Rahul Singh <rahul.singh@xxxxxxx>]

From: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>

Backport Linux commit 376cdf66f624. This is the clean backport without
any changes.

When building with C=1, sparse reports some issues regarding
endianness annotations:

arm-smmu-v3.c:221:26: warning: cast to restricted __le64
arm-smmu-v3.c:221:24: warning: incorrect type in assignment (different base 
types)
arm-smmu-v3.c:221:24:    expected restricted __le64 [usertype]
arm-smmu-v3.c:221:24:    got unsigned long long [usertype]
arm-smmu-v3.c:229:20: warning: incorrect type in argument 1 (different base 
types)
arm-smmu-v3.c:229:20:    expected restricted __le64 [usertype] *[assigned] dst
arm-smmu-v3.c:229:20:    got unsigned long long [usertype] *ent
arm-smmu-v3.c:229:25: warning: incorrect type in argument 2 (different base 
types)
arm-smmu-v3.c:229:25:    expected unsigned long long [usertype] *[assigned] src
arm-smmu-v3.c:229:25:    got restricted __le64 [usertype] *
arm-smmu-v3.c:396:20: warning: incorrect type in argument 1 (different base 
types)
arm-smmu-v3.c:396:20:    expected restricted __le64 [usertype] *[assigned] dst
arm-smmu-v3.c:396:20:    got unsigned long long *
arm-smmu-v3.c:396:25: warning: incorrect type in argument 2 (different base 
types)
arm-smmu-v3.c:396:25:    expected unsigned long long [usertype] *[assigned] src
arm-smmu-v3.c:396:25:    got restricted __le64 [usertype] *
arm-smmu-v3.c:1349:32: warning: invalid assignment: |=
arm-smmu-v3.c:1349:32:    left side has type restricted __le64
arm-smmu-v3.c:1349:32:    right side has type unsigned long
arm-smmu-v3.c:1396:53: warning: incorrect type in argument 3 (different base 
types)
arm-smmu-v3.c:1396:53:    expected restricted __le64 [usertype] *dst
arm-smmu-v3.c:1396:53:    got unsigned long long [usertype] *strtab
arm-smmu-v3.c:1424:39: warning: incorrect type in argument 1 (different base 
types)
arm-smmu-v3.c:1424:39:    expected unsigned long long [usertype] *[assigned] 
strtab
arm-smmu-v3.c:1424:39:    got restricted __le64 [usertype] *l2ptr

While harmless, they are incorrect and could hide actual errors during
development. Fix them.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>
Link: https://lore.kernel.org/r/20200918141856.629722-1-jean-philippe@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
376cdf66f624
Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
---
Changes in v2:
 - fix commit msg
---
 xen/drivers/passthrough/arm/smmu-v3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/passthrough/arm/smmu-v3.c 
b/xen/drivers/passthrough/arm/smmu-v3.c
index 340609264d..64d39bb4d3 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -1037,7 +1037,7 @@ static int queue_insert_raw(struct arm_smmu_queue *q, u64 
*ent)
        return 0;
 }
 
-static void queue_read(__le64 *dst, u64 *src, size_t n_dwords)
+static void queue_read(u64 *dst, __le64 *src, size_t n_dwords)
 {
        int i;
 
@@ -1436,7 +1436,7 @@ static void arm_smmu_write_strtab_ent(struct 
arm_smmu_master *master, u32 sid,
                arm_smmu_cmdq_issue_cmd(smmu, &prefetch_cmd);
 }
 
-static void arm_smmu_init_bypass_stes(u64 *strtab, unsigned int nent)
+static void arm_smmu_init_bypass_stes(__le64 *strtab, unsigned int nent)
 {
        unsigned int i;
 
-- 
2.25.1