linux-kernel - [PATCH RFT/RFC 40/49] staging: media: zoran: device support only 32bit DMA address

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Message-Id: <1600683624-5863-41-git-send-email-clabbe@baylibre.com>
Date:   Mon, 21 Sep 2020 10:20:15 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     gregkh@...uxfoundation.org, laurent.pinchart@...net.be,
        mchehab@...nel.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH RFT/RFC 40/49] staging: media: zoran: device support only 32bit DMA address

The zoran device only supports 32bit DMA address.

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/staging/media/zoran/zoran_card.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/staging/media/zoran/zoran_card.c b/drivers/staging/media/zoran/zoran_card.c
index 864196e7acae..ab16a70a7451 100644
--- a/drivers/staging/media/zoran/zoran_card.c
+++ b/drivers/staging/media/zoran/zoran_card.c
@@ -1101,6 +1101,12 @@ static int zoran_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	int card_num;
 	const char *codec_name, *vfe_name;
 	unsigned int nr;
+	int err;
+
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (err)
+		return -ENODEV;
+	vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 
 	nr = zoran_num++;
 	if (nr >= BUZ_MAX) {
-- 
2.26.2