lkml.org 
[lkml]   [2021]   [May]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 4/4] DMA: XILINX_ZYNQMP_DPDMA depends on HAS_IOMEM
Hi Randy,

On Sat, May 22, 2021 at 06:07:01PM -0700, Randy Dunlap wrote:
> On 5/22/21 5:20 PM, Laurent Pinchart wrote:
> > On Fri, May 21, 2021 at 07:13:13PM -0700, Randy Dunlap wrote:
> >> When CONFIG_HAS_IOMEM is not set/enabled, most iomap() family
> >> functions [including ioremap(), devm_ioremap(), etc.] are not
> >> available.
> >> Drivers that use these functions should depend on HAS_IOMEM so that
> >> they do not cause build errors.
> >>
> >> Cures this build error:
> >> s390-linux-ld: drivers/dma/xilinx/xilinx_dpdma.o: in function `xilinx_dpdma_probe':
> >> xilinx_dpdma.c:(.text+0x336a): undefined reference to `devm_platform_ioremap_resource'
> >
> > I've previously posted
> > https://lore.kernel.org/dmaengine/20210520152420.23986-2-laurent.pinchart@ideasonboard.com/T/#u
> > which fixes the same issue (plus an additional one).
>
> Hi Laurent,
>
> I didn't add a dependency on OF because OF header files _mostly_
> have stubs so that they work when OF is enabled or disabled.
>
> I did find a problem in <linux/of_address.h> where it could end up
> without having a stub. I will post a patch for that soon.
> I'm currently doing lots of randconfig builds on it.

I'm fine with eithe approach, but the patch you've posted to address the
of_address.h issue has an issue itself.

If Vinod would prefer merging this patch instead of mine,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> >> Fixes: 7cbb0c63de3fc ("dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver")
> >> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> >> Reported-by: kernel test robot <lkp@intel.com>
> >> Cc: Vinod Koul <vkoul@kernel.org>
> >> CC: dmaengine@vger.kernel.org
> >> Cc: Hyun Kwon <hyun.kwon@xilinx.com>
> >> Cc: Tejas Upadhyay <tejasu@xilinx.com>
> >> Cc: Michal Simek <michal.simek@xilinx.com>
> >> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> >> ---
> >> drivers/dma/Kconfig | 1 +
> >> 1 file changed, 1 insertion(+)
> >>
> >> --- linux-next-20210521.orig/drivers/dma/Kconfig
> >> +++ linux-next-20210521/drivers/dma/Kconfig
> >> @@ -702,6 +702,7 @@ config XILINX_ZYNQMP_DMA
> >>
> >> config XILINX_ZYNQMP_DPDMA
> >> tristate "Xilinx DPDMA Engine"
> >> + depends on HAS_IOMEM
> >> select DMA_ENGINE
> >> select DMA_VIRTUAL_CHANNELS
> >> help

--
Regards,

Laurent Pinchart

\
 
 \ /
  Last update: 2021-05-23 20:53    [W:0.338 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site