linux-kernel - [PATCH v2 3/4] media: cedrus: Wrap PHYS_PFN_OFFSET with ifdef and add dedicated comment

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Message-Id: <20180909191015.20902-4-contact@paulk.fr>
Date:   Sun,  9 Sep 2018 21:10:14 +0200
From:   Paul Kocialkowski <contact@...lk.fr>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-arm-kernel@...ts.infradead.org
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-sunxi@...glegroups.com, Randy Li <ayaka@...lik.info>,
        Hans Verkuil <hverkuil@...all.nl>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Paul Kocialkowski <contact@...lk.fr>
Subject: [PATCH v2 3/4] media: cedrus: Wrap PHYS_PFN_OFFSET with ifdef and add dedicated comment

Since PHYS_PFN_OFFSET is not defined for all architectures, it is
requried to wrap it with ifdef so that it can be built on all
architectures.

Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
---
 drivers/staging/media/sunxi/cedrus/cedrus_hw.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
index f4307e8f7908..32adbcbe6175 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
@@ -199,8 +199,13 @@ int cedrus_hw_probe(struct cedrus_dev *dev)
 	/*
 	 * The VPU is only able to handle bus addresses so we have to subtract
 	 * the RAM offset to the physcal addresses.
+	 *
+	 * This information will eventually be obtained from device-tree.
 	 */
+
+#ifdef PHYS_PFN_OFFSET
 	dev->dev->dma_pfn_offset = PHYS_PFN_OFFSET;
+#endif
 
 	ret = of_reserved_mem_device_init(dev->dev);
 	if (ret && ret != -ENODEV) {
-- 
2.18.0