linux-kernel - [PATCH 2/9] nouveau: reset dma_nr in nouveau_dmem_migrate_alloc_and

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Message-Id: <20190729142843.22320-3-hch@lst.de>
Date:   Mon, 29 Jul 2019 17:28:36 +0300
From:   Christoph Hellwig <hch@....de>
To:     Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>
Cc:     Ralph Campbell <rcampbell@...dia.com>,
        Bharata B Rao <bharata@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/9] nouveau: reset dma_nr in nouveau_dmem_migrate_alloc_and_copy

When we start a new batch of dma_map operations we need to reset dma_nr,
as we start filling a newly allocated array.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/gpu/drm/nouveau/nouveau_dmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c
index 38416798abd4..e696157f771e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dmem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c
@@ -682,6 +682,7 @@ nouveau_dmem_migrate_alloc_and_copy(struct vm_area_struct *vma,
 	migrate->dma = kmalloc(sizeof(*migrate->dma) * npages, GFP_KERNEL);
 	if (!migrate->dma)
 		goto error;
+	migrate->dma_nr = 0;
 
 	/* Copy things over */
 	copy = drm->dmem->migrate.copy_func;
-- 
2.20.1