From: Arnd Bergmann <arnd@arndb.de>
To: monstr@monstr.eu
Cc: Timur Tabi <timur@tabi.org>,
Michal Simek <michal.simek@xilinx.com>,
linux-kernel@vger.kernel.org,
Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
linux-fbdev@vger.kernel.org
Subject: Re: [PATCH v3 7/8] video: xilinxfb: Fix sparse warnings
Date: Fri, 31 May 2013 16:56:44 +0200 [thread overview]
Message-ID: <1466524.sgAzczhnBg@wuerfel> (raw)
In-Reply-To: <51A8B220.6070308@monstr.eu>
On Friday 31 May 2013 16:22:24 Michal Simek wrote:
> @@ -307,7 +319,11 @@ static int xilinxfb_assign(struct platform_device *pdev,
>
> /* Fill struct fb_info */
> drvdata->info.device = dev;
> - drvdata->info.screen_base = (void __iomem *)drvdata->fb_virt;
> + if (drvdata->fb_virt)
> + drvdata->info.screen_base = (__force void __iomem *)
> + drvdata->fb_virt;
> + else
> + drvdata->info.screen_base = drvdata->fb_virt_io;
Yes, unfortunately, this is what all other frame buffer drivers do
at the moment. It is technically not correct, but most architectures
are able to call readl/writel on regular memory, or dereference
__iomem tokens, so we often get away with it. It's probably not
worth fixing it in the fbdev code base as that would be a huge
change, and people are migrating to DRM/KMS.
Arnd
next prev parent reply other threads:[~2013-05-31 14:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-31 12:55 [PATCH v3 0/8] xilinxfb changes Michal Simek
2013-05-31 12:55 ` [PATCH v3 1/8] video: xilinxfb: Fix OF probing on little-endian systems Michal Simek
2013-05-31 13:05 ` Timur Tabi
2013-05-31 13:09 ` Michal Simek
2013-05-31 12:55 ` [PATCH v3 2/8] video: xilinxfb: Do not name out_be32 in function name Michal Simek
2013-05-31 12:55 ` [PATCH v3 3/8] video: xilinxfb: Rename PLB_ACCESS_FLAG to BUS_ACCESS_FLAG Michal Simek
2013-05-31 12:55 ` [PATCH v3 4/8] video: xilinxfb: Use drvdata->regs_phys instead of physaddr Michal Simek
2013-05-31 12:55 ` [PATCH v3 5/8] video: xilinxfb: Group bus initialization Michal Simek
2013-05-31 12:55 ` [PATCH v3 6/8] video: xilinxfb: Add support for little endian accesses Michal Simek
2013-05-31 13:38 ` Arnd Bergmann
2013-05-31 12:55 ` [PATCH v3 7/8] video: xilinxfb: Fix sparse warnings Michal Simek
2013-05-31 13:26 ` Timur Tabi
2013-05-31 13:37 ` Michal Simek
2013-05-31 13:41 ` Timur Tabi
2013-05-31 14:22 ` Michal Simek
2013-05-31 14:56 ` Arnd Bergmann [this message]
2013-05-31 15:06 ` Timur Tabi
2013-05-31 15:29 ` Arnd Bergmann
2013-05-31 16:33 ` Michal Simek
2013-05-31 15:28 ` Arnd Bergmann
2013-05-31 12:55 ` [PATCH v3 8/8] video: xilinxfb: Use driver for Xilinx ARM Zynq Michal Simek
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