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author | Ingo Molnar <mingo@elte.hu> | 2008-11-19 09:44:37 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-19 09:44:37 +0100 |
commit | 3ac3ba0b396fd99550e08034b0e4c27fdf39c252 (patch) | |
tree | f9f69fac41d66540a37a33808714d055d702328f /drivers/dma/iovlock.c | |
parent | 934352f214b3251eb0793c1209d346595a661d80 (diff) | |
parent | 7f0f598a0069d1ab072375965a4b69137233169c (diff) | |
download | lwn-3ac3ba0b396fd99550e08034b0e4c27fdf39c252.tar.gz lwn-3ac3ba0b396fd99550e08034b0e4c27fdf39c252.zip |
Merge branch 'linus' into sched/core
Conflicts:
kernel/Makefile
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) |