Commit c5e0ec66 authored by Oded Gabbay's avatar Oded Gabbay
Browse files

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: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent 3174ac9b

drivers/misc/habanalabs/common/command_buffer.c

+4 −0
Original line number Diff line number Diff line
@@ -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);

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