diff options
| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2022-04-25 15:18:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-26 12:29:59 +0300 |
| commit | f3e93e3e25251b7053bfddac11507667217efbd2 (patch) | |
| tree | 82a54c3345019c2fbfa863c1d8fe001bb4987f94 /drivers/staging/vc04_services/bcm2835-camera | |
| parent | 8896ac5d0d3d9c5d9e67a22b0a9d36b6117fb2f0 (diff) | |
| download | linux-f3e93e3e25251b7053bfddac11507667217efbd2.tar.xz | |
staging: vc04_services: Re-add dependency on HAS_DMA to BCM2835_VCHIQ
Thanks to stubs for the NO_DMA=y case, drivers that use the DMA API can
be compile-tested on systems that do not support DMA. Hence the
dependency of BCM2835_VCHIQ on HAS_DMA was dropped to increase compile
coverage.
Unfortunately compilers became smarter, leading to new failures.
E.g. for a CONFIG_SUN3=y allmodconfig kernel with gcc 9.4.0:
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c: In function ‘free_pagelist’:
arch/m68k/include/asm/string.h:72:25: warning: argument 2 null where non-null expected [-Wnonnull]
72 | #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c:614:4: note: in expansion of macro ‘memcpy’
614 | memcpy((char *)kmap(pages[0]) +
| ^~~~~~
arch/m68k/include/asm/string.h:72:25: note: in a call to built-in function ‘__builtin_memcpy’
72 | #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c:614:4: note: in expansion of macro ‘memcpy’
614 | memcpy((char *)kmap(pages[0]) +
| ^~~~~~
This happens because the compiler can trace back the source pointer to a
allocation by dma_alloc_attrs(), which always returns NULL if NO_DMA=y.
Avoid this reinstating the dependency of the BCM2835_VCHIQ symbol on
HAS_DMA, and by restricting the selection of BCM2835_VCHIQ.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/da55bd87eebf1a969dc8ccd807843319833f6c40.1650888813.git.geert@linux-m68k.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vc04_services/bcm2835-camera')
| -rw-r--r-- | drivers/staging/vc04_services/bcm2835-camera/Kconfig | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/vc04_services/bcm2835-camera/Kconfig b/drivers/staging/vc04_services/bcm2835-camera/Kconfig index dcda565f9b38..870c9afb223a 100644 --- a/drivers/staging/vc04_services/bcm2835-camera/Kconfig +++ b/drivers/staging/vc04_services/bcm2835-camera/Kconfig @@ -3,8 +3,8 @@ config VIDEO_BCM2835 tristate "BCM2835 Camera" depends on MEDIA_SUPPORT depends on VIDEO_DEV && (ARCH_BCM2835 || COMPILE_TEST) - select BCM2835_VCHIQ - select BCM2835_VCHIQ_MMAL + select BCM2835_VCHIQ if HAS_DMA + select BCM2835_VCHIQ_MMAL if HAS_DMA select VIDEOBUF2_VMALLOC select BTREE help |