Messages in this thread Patch in this message | | | From | David Hildenbrand <> | Subject | [PATCH v2 1/2] drivers/video/fbdev: don't select DMA_CMA | Date | Thu, 8 Apr 2021 12:05:22 +0200 |
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Random drivers should not override a user configuration of core knobs (e.g., CONFIG_DMA_CMA=n). Use "imply" instead, to still respect dependencies and manual overrides.
"This is similar to "select" as it enforces a lower limit on another symbol except that the "implied" symbol's value may still be set to n from a direct dependency or with a visible prompt."
Implying DMA_CMA should be sufficient, as that depends on CMA.
Note: If this is a real dependency, we should use "depends on DMA_CMA" instead - but I assume the driver can work without CMA just fine -- esp. when we wouldn't have HAVE_DMA_CONTIGUOUS or CMA right now.
Signed-off-by: David Hildenbrand <david@redhat.com> --- drivers/video/fbdev/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index 4f02db65dede..d37cd5341e1b 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -2186,7 +2186,7 @@ config FB_HYPERV select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT select FB_DEFERRED_IO - select DMA_CMA if HAVE_DMA_CONTIGUOUS && CMA + imply DMA_CMA help This framebuffer driver supports Microsoft Hyper-V Synthetic Video. -- 2.30.2
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