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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2020-08-29 11:55:15 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-09-22 18:49:51 +0300 |
| commit | c5e0ec66f01d6621a64837428efcbbe731d90cd5 (patch) | |
| tree | 7c3fd221a9cfd20789584e3c5401b9530546b497 /drivers/misc/habanalabs | |
| parent | 3174ac9bb1045946ff563aa01d679809e87fb2db (diff) | |
habanalabs: clear vm_pgoff before doing the mmap
The driver use vm_pgoff to hold the CB idr handle. Before we actually call
the mapping function, we need to clear the handle so there won't be any
garbage left in vm_pgoff.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs')
| -rw-r--r-- | drivers/misc/habanalabs/common/command_buffer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c index 68dfbafe3354..6563e4dfe7b6 100644 --- a/drivers/misc/habanalabs/common/command_buffer.c +++ b/drivers/misc/habanalabs/common/command_buffer.c @@ -304,7 +304,11 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma) u32 handle, user_cb_size; int rc; + /* We use the page offset to hold the idr and thus we need to clear + * it before doing the mmap itself + */ handle = vma->vm_pgoff; + vma->vm_pgoff = 0; /* reference was taken here */ cb = hl_cb_get(hdev, &hpriv->cb_mgr, handle); |