linux-kernel - [PATCH 1/7] ASoC: txx9: don't work around too small resource_size

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Message-Id: <20200416150011.820984-2-hch@lst.de>
Date:   Thu, 16 Apr 2020 17:00:05 +0200
From:   Christoph Hellwig <hch@....de>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 1/7] ASoC: txx9: don't work around too small resource_size_t

The txx9 sound driver deends on HAS_TXX9_ACLC, which is only set for
three tx49xx SOCs, and thus always has a 64-bit phys_addr_t and
resource_size_t.  Instead of poking into ioremap internals to work
around a potentially too small resource_size_t just add a BUILD_BUG_ON
to catch such a case.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 sound/soc/txx9/txx9aclc-ac97.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sound/soc/txx9/txx9aclc-ac97.c b/sound/soc/txx9/txx9aclc-ac97.c
index b1d9615f2375..7402448bdb09 100644
--- a/sound/soc/txx9/txx9aclc-ac97.c
+++ b/sound/soc/txx9/txx9aclc-ac97.c
@@ -175,6 +175,8 @@ static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
 	int err;
 	int irq;
 
+	BUILD_BUG_ON(sizeof(drvdata->physbase) > sizeof(r->start));
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
@@ -190,10 +192,6 @@ static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, drvdata);
 	drvdata->physbase = r->start;
-	if (sizeof(drvdata->physbase) > sizeof(r->start) &&
-	    r->start >= TXX9_DIRECTMAP_BASE &&
-	    r->start < TXX9_DIRECTMAP_BASE + 0x400000)
-		drvdata->physbase |= 0xf00000000ull;
 	err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
 			       0, dev_name(&pdev->dev), drvdata);
 	if (err < 0)
-- 
2.25.1