Merge tag 'mvebu-dt-3.17-2' of git://git.infradead.org/linux-mvebu into next/dt

[cascardo/linux.git] / drivers / gpu / drm / msm / msm_iommu.c

diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c
index 92b7459..4b2ad91 100644 (file)
--- a/drivers/gpu/drm/msm/msm_iommu.c
+++ b/drivers/gpu/drm/msm/msm_iommu.c
@@ -28,7 +28,7 @@ static int msm_fault_handler(struct iommu_domain *iommu, struct device *dev,
                unsigned long iova, int flags, void *arg)
 {
        DBG("*** fault: iova=%08lx, flags=%d", iova, flags);
-       return 0;
+       return -ENOSYS;
 }
 
 static int msm_iommu_attach(struct msm_mmu *mmu, const char **names, int cnt)
@@ -40,8 +40,10 @@ static int msm_iommu_attach(struct msm_mmu *mmu, const char **names, int cnt)
        for (i = 0; i < cnt; i++) {
                struct device *msm_iommu_get_ctx(const char *ctx_name);
                struct device *ctx = msm_iommu_get_ctx(names[i]);
-               if (IS_ERR_OR_NULL(ctx))
+               if (IS_ERR_OR_NULL(ctx)) {
+                       dev_warn(dev->dev, "couldn't get %s context", names[i]);
                        continue;
+               }
                ret = iommu_attach_device(iommu->domain, ctx);
                if (ret) {
                        dev_warn(dev->dev, "could not attach iommu to %s", names[i]);
@@ -52,6 +54,20 @@ static int msm_iommu_attach(struct msm_mmu *mmu, const char **names, int cnt)
        return 0;
 }
 
+static void msm_iommu_detach(struct msm_mmu *mmu, const char **names, int cnt)
+{
+       struct msm_iommu *iommu = to_msm_iommu(mmu);
+       int i;
+
+       for (i = 0; i < cnt; i++) {
+               struct device *msm_iommu_get_ctx(const char *ctx_name);
+               struct device *ctx = msm_iommu_get_ctx(names[i]);
+               if (IS_ERR_OR_NULL(ctx))
+                       continue;
+               iommu_detach_device(iommu->domain, ctx);
+       }
+}
+
 static int msm_iommu_map(struct msm_mmu *mmu, uint32_t iova,
                struct sg_table *sgt, unsigned len, int prot)
 {
@@ -110,7 +126,7 @@ static int msm_iommu_unmap(struct msm_mmu *mmu, uint32_t iova,
 
                VERB("unmap[%d]: %08x(%x)", i, iova, bytes);
 
-               BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE));
+               BUG_ON(!PAGE_ALIGNED(bytes));
 
                da += bytes;
        }
@@ -127,6 +143,7 @@ static void msm_iommu_destroy(struct msm_mmu *mmu)
 
 static const struct msm_mmu_funcs funcs = {
                .attach = msm_iommu_attach,
+               .detach = msm_iommu_detach,
                .map = msm_iommu_map,
                .unmap = msm_iommu_unmap,
                .destroy = msm_iommu_destroy,