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busdma: emit a warning for use of filters

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Filter functions are deprecated, and unused in the tree. If either of
the filter or filterarg arguments to bus_dma_tag_create() are non-NULL,
print a warning.

This is a direct commit to stable/14.

Reviewed by:	jhb
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D42897
This commit is contained in:
Mitchell Horne 2023-12-04 11:46:48 -04:00
parent e64d827d3a
commit 165cc0eea9
5 changed files with 20 additions and 0 deletions
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4
sys/arm/arm/busdma_machdep.c
View file

@ -398,6 +398,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
/* Return a NULL tag on failure */
*dmat = NULL;
/* Filters are deprecated, emit a warning. */
if (filter != NULL || filterarg != NULL)
printf("Warning: use of filters is deprecated; see busdma(9)\n");
newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_BUSDMA,
M_ZERO | M_NOWAIT);
if (newtag == NULL) {

4
sys/arm64/arm64/busdma_machdep.c
View file

@ -161,6 +161,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
struct bus_dma_tag_common *tc;
int error;
/* Filters are deprecated, emit a warning. */
if (filter != NULL || filterarg != NULL)
printf("Warning: use of filters is deprecated; see busdma(9)\n");
if (parent == NULL) {
error = bus_dma_bounce_impl.tag_create(parent, alignment,
boundary, lowaddr, highaddr, filter, filterarg, maxsize,

4
sys/powerpc/powerpc/busdma_machdep.c
View file

@ -168,6 +168,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
return (EINVAL);
}
/* Filters are deprecated, emit a warning. */
if (filter != NULL || filterarg != NULL)
printf("Warning: use of filters is deprecated; see busdma(9)\n");
/* Return a NULL tag on failure */
*dmat = NULL;

4
sys/riscv/riscv/busdma_machdep.c
View file

@ -162,6 +162,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
struct bus_dma_tag_common *tc;
int error;
/* Filters are deprecated, emit a warning. */
if (filter != NULL || filterarg != NULL)
printf("Warning: use of filters is deprecated; see busdma(9)\n");
if (parent == NULL) {
error = bus_dma_bounce_impl.tag_create(parent, alignment,
boundary, lowaddr, highaddr, filter, filterarg, maxsize,

4
sys/x86/x86/busdma_machdep.c
View file

@ -184,6 +184,10 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
struct bus_dma_tag_common *tc;
int error;
/* Filters are deprecated, emit a warning. */
if (filter != NULL || filterarg != NULL)
printf("Warning: use of filters is deprecated; see busdma(9)\n");
if (parent == NULL) {
error = bus_dma_bounce_impl.tag_create(parent, alignment,
boundary, lowaddr, highaddr, filter, filterarg, maxsize,