diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-08-21 10:33:30 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2013-09-17 13:03:10 +0200 |
| commit | faea13b72dbdb77e4d6ad83344596486611708b0 (patch) | |
| tree | d2412786f2f53fbea610027bfc0462c77dfcd371 /drivers/iommu/arm-smmu.c | |
| parent | Linux 3.12-rc1 (diff) | |
| download | linux-faea13b72dbdb77e4d6ad83344596486611708b0.tar.xz linux-faea13b72dbdb77e4d6ad83344596486611708b0.zip | |
iommu/arm-smmu: fix a signedness bug
Unsigned char is never equal to -1.
Cc: <stable@vger.kernel.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index f417e89e1e7e..7243af3b891f 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -377,6 +377,7 @@ struct arm_smmu_cfg { u32 cbar; pgd_t *pgd; }; +#define INVALID_IRPTNDX 0xff #define ARM_SMMU_CB_ASID(cfg) ((cfg)->cbndx) #define ARM_SMMU_CB_VMID(cfg) ((cfg)->cbndx + 1) @@ -840,7 +841,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain, if (IS_ERR_VALUE(ret)) { dev_err(smmu->dev, "failed to request context IRQ %d (%u)\n", root_cfg->irptndx, irq); - root_cfg->irptndx = -1; + root_cfg->irptndx = INVALID_IRPTNDX; goto out_free_context; } @@ -869,7 +870,7 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain) writel_relaxed(0, cb_base + ARM_SMMU_CB_SCTLR); arm_smmu_tlb_inv_context(root_cfg); - if (root_cfg->irptndx != -1) { + if (root_cfg->irptndx != INVALID_IRPTNDX) { irq = smmu->irqs[smmu->num_global_irqs + root_cfg->irptndx]; free_irq(irq, domain); } |