linux-kernel - [PATCH v7 04/17] misc/habana: Use FOLL

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Date:   Fri, 27 Nov 2020 17:41:18 +0100
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     DRI Development <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     kvm@...r.kernel.org, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-media@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Oded Gabbay <ogabbay@...nel.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Andrew Morton <akpm@...ux-foundation.org>,
        John Hubbard <jhubbard@...dia.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jan Kara <jack@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Oded Gabbay <oded.gabbay@...il.com>,
        Omer Shpigelman <oshpigelman@...ana.ai>,
        Ofir Bitton <obitton@...ana.ai>,
        Tomer Tayar <ttayar@...ana.ai>,
        Moti Haimovski <mhaimovski@...ana.ai>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pawel Piskorski <ppiskorski@...ana.ai>
Subject: [PATCH v7 04/17] misc/habana: Use FOLL_LONGTERM for userptr

These are persistent, not just for the duration of a dma operation.

Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: John Hubbard <jhubbard@...dia.com>
Cc: Jérôme Glisse <jglisse@...hat.com>
Cc: Jan Kara <jack@...e.cz>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: linux-mm@...ck.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-samsung-soc@...r.kernel.org
Cc: linux-media@...r.kernel.org
Cc: Oded Gabbay <oded.gabbay@...il.com>
Cc: Omer Shpigelman <oshpigelman@...ana.ai>
Cc: Ofir Bitton <obitton@...ana.ai>
Cc: Tomer Tayar <ttayar@...ana.ai>
Cc: Moti Haimovski <mhaimovski@...ana.ai>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Pawel Piskorski <ppiskorski@...ana.ai>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
---
 drivers/misc/habanalabs/common/memory.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index 2c59fa869684..0d25ae1d5f3e 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -1296,7 +1296,8 @@ static int get_user_memory(struct hl_device *hdev, u64 addr, u64 size,
 	if (!userptr->pages)
 		return -ENOMEM;
 
-	rc = pin_user_pages_fast(start, npages, FOLL_FORCE | FOLL_WRITE,
+	rc = pin_user_pages_fast(start, npages,
+				 FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM,
 				 userptr->pages);
 
 	if (rc != npages) {
-- 
2.29.2