diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-12-17 18:18:50 +0100 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2014-01-07 15:35:25 +0100 |
| commit | e87c621dced122a9a0a51b56944b08421d273c8f (patch) | |
| tree | 66df432b82d2d7306d846d2e734ce65a823b5ab6 /drivers/iommu | |
| parent | iommu/shmobile: Allocate archdata with kzalloc() (diff) | |
| download | linux-e87c621dced122a9a0a51b56944b08421d273c8f.tar.xz linux-e87c621dced122a9a0a51b56944b08421d273c8f.zip | |
iommu/shmobile: Turn the flush_lock mutex into a spinlock
The lock is taken in atomic context, replace it with a spinlock.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/shmobile-ipmmu.c | 10 | ||||
| -rw-r--r-- | drivers/iommu/shmobile-ipmmu.h | 2 |
2 files changed, 6 insertions, 6 deletions
diff --git a/drivers/iommu/shmobile-ipmmu.c b/drivers/iommu/shmobile-ipmmu.c index 8321f89596c4..e3bc2e19b6dd 100644 --- a/drivers/iommu/shmobile-ipmmu.c +++ b/drivers/iommu/shmobile-ipmmu.c @@ -35,12 +35,12 @@ void ipmmu_tlb_flush(struct shmobile_ipmmu *ipmmu) if (!ipmmu) return; - mutex_lock(&ipmmu->flush_lock); + spin_lock(&ipmmu->flush_lock); if (ipmmu->tlb_enabled) ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH | IMCTR1_TLBEN); else ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH); - mutex_unlock(&ipmmu->flush_lock); + spin_unlock(&ipmmu->flush_lock); } void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size, @@ -49,7 +49,7 @@ void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size, if (!ipmmu) return; - mutex_lock(&ipmmu->flush_lock); + spin_lock(&ipmmu->flush_lock); switch (size) { default: ipmmu->tlb_enabled = 0; @@ -85,7 +85,7 @@ void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size, } ipmmu_reg_write(ipmmu, IMTTBR, phys); ipmmu_reg_write(ipmmu, IMASID, asid); - mutex_unlock(&ipmmu->flush_lock); + spin_unlock(&ipmmu->flush_lock); } static int ipmmu_probe(struct platform_device *pdev) @@ -104,7 +104,7 @@ static int ipmmu_probe(struct platform_device *pdev) dev_err(&pdev->dev, "cannot allocate device data\n"); return -ENOMEM; } - mutex_init(&ipmmu->flush_lock); + spin_lock_init(&ipmmu->flush_lock); ipmmu->dev = &pdev->dev; ipmmu->ipmmu_base = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); diff --git a/drivers/iommu/shmobile-ipmmu.h b/drivers/iommu/shmobile-ipmmu.h index 4d53684673e1..9524743ca1fb 100644 --- a/drivers/iommu/shmobile-ipmmu.h +++ b/drivers/iommu/shmobile-ipmmu.h @@ -14,7 +14,7 @@ struct shmobile_ipmmu { struct device *dev; void __iomem *ipmmu_base; int tlb_enabled; - struct mutex flush_lock; + spinlock_t flush_lock; const char * const *dev_names; unsigned int num_dev_names; }; |