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be0639063a
Merged upstream: bcm27xx/patches-5.4/950-1014-Revert-mailbox-avoid-timer-start-from-callback.patch generic/backport-5.4/080-wireguard-0021-crypto-blake2s-generic-C-library-implementation-and-.patch Manually adapted: layerscape/patches-5.4/801-audio-0005-Revert-ASoC-fsl_sai-Add-support-for-SAI-new-version.patch oxnas/patches-5.4/100-oxnas-clk-plla-pllb.patch Compile-tested: lantiq/xrx200 Run-tested: lantiq/xrx200 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
68 lines
2.1 KiB
Diff
68 lines
2.1 KiB
Diff
From ad21bb0b5abf5414e31ac3e41ff60216bee52982 Mon Sep 17 00:00:00 2001
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From: Gurchetan Singh <gurchetansingh@chromium.org>
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Date: Mon, 2 Dec 2019 17:36:25 -0800
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Subject: [PATCH] udmabuf: add a pointer to the miscdevice in dma-buf
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private data
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Commit c1bbed668997268c9edccdc9db1bd1487d9e20b0 upstream.
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Will be used later.
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v2: rename 'udmabuf_misc' to 'device' (kraxel)
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Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
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Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-2-gurchetansingh@chromium.org
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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---
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drivers/dma-buf/udmabuf.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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--- a/drivers/dma-buf/udmabuf.c
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+++ b/drivers/dma-buf/udmabuf.c
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@@ -18,6 +18,7 @@ static const size_t size_limit_mb = 64;
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struct udmabuf {
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pgoff_t pagecount;
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struct page **pages;
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+ struct miscdevice *device;
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};
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static vm_fault_t udmabuf_vm_fault(struct vm_fault *vmf)
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@@ -107,8 +108,9 @@ static const struct dma_buf_ops udmabuf_
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#define SEALS_WANTED (F_SEAL_SHRINK)
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#define SEALS_DENIED (F_SEAL_WRITE)
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-static long udmabuf_create(const struct udmabuf_create_list *head,
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- const struct udmabuf_create_item *list)
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+static long udmabuf_create(struct miscdevice *device,
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+ struct udmabuf_create_list *head,
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+ struct udmabuf_create_item *list)
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{
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DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
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struct file *memfd = NULL;
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@@ -179,6 +181,7 @@ static long udmabuf_create(const struct
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exp_info.priv = ubuf;
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exp_info.flags = O_RDWR;
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+ ubuf->device = device;
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buf = dma_buf_export(&exp_info);
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if (IS_ERR(buf)) {
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ret = PTR_ERR(buf);
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@@ -216,7 +219,7 @@ static long udmabuf_ioctl_create(struct
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list.offset = create.offset;
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list.size = create.size;
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- return udmabuf_create(&head, &list);
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+ return udmabuf_create(filp->private_data, &head, &list);
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}
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static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
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@@ -235,7 +238,7 @@ static long udmabuf_ioctl_create_list(st
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if (IS_ERR(list))
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return PTR_ERR(list);
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- ret = udmabuf_create(&head, list);
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+ ret = udmabuf_create(filp->private_data, &head, list);
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kfree(list);
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return ret;
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}
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