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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-12-20 12:54:54 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-12-20 12:54:54 +0300 |
| commit | 93b8eef1c098efbea2f1fc0be7e3c681f259a7e7 (patch) | |
| tree | 462cc8c2bc07bbc825dab2a200891a28d8643329 /drivers/dma/iovlock.c | |
| parent | a2d781fc8d9b16113dd9440107d73c0f21d7cbef (diff) | |
| parent | 929096fe9ff1f4b3645cf3919527ab47e8d5e17c (diff) | |
| download | linux-93b8eef1c098efbea2f1fc0be7e3c681f259a7e7.tar.xz | |
Merge commit 'v2.6.28-rc9' into next
Diffstat (limited to 'drivers/dma/iovlock.c')
| -rw-r--r-- | drivers/dma/iovlock.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c index e763d723e4cf..9f6fe46a9b87 100644 --- a/drivers/dma/iovlock.c +++ b/drivers/dma/iovlock.c @@ -55,7 +55,6 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) int nr_iovecs = 0; int iovec_len_used = 0; int iovec_pages_used = 0; - long err; /* don't pin down non-user-based iovecs */ if (segment_eq(get_fs(), KERNEL_DS)) @@ -72,23 +71,21 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) local_list = kmalloc(sizeof(*local_list) + (nr_iovecs * sizeof (struct dma_page_list)) + (iovec_pages_used * sizeof (struct page*)), GFP_KERNEL); - if (!local_list) { - err = -ENOMEM; + if (!local_list) goto out; - } /* list of pages starts right after the page list array */ pages = (struct page **) &local_list->page_list[nr_iovecs]; + local_list->nr_iovecs = 0; + for (i = 0; i < nr_iovecs; i++) { struct dma_page_list *page_list = &local_list->page_list[i]; len -= iov[i].iov_len; - if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len)) { - err = -EFAULT; + if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len)) goto unpin; - } page_list->nr_pages = num_pages_spanned(&iov[i]); page_list->base_address = iov[i].iov_base; @@ -109,10 +106,8 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) NULL); up_read(¤t->mm->mmap_sem); - if (ret != page_list->nr_pages) { - err = -ENOMEM; + if (ret != page_list->nr_pages) goto unpin; - } local_list->nr_iovecs = i + 1; } @@ -122,7 +117,7 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len) unpin: dma_unpin_iovec_pages(local_list); out: - return ERR_PTR(err); + return NULL; } void dma_unpin_iovec_pages(struct dma_pinned_list *pinned_list) |