Several sub-modules of 'firewire' need HAS_DMA, so let them depend on it.
FIREWIRE_NET and FIREWIRE_OHCI use 'core-iso.c' which also needs HAS_DMA,
so need 'ifdef' the related function by CONFIG_HAS_DMA in 'core-iso.c'.
The related error (with allmodconfig under score):
MODPOST 1365 modules
ERROR: "dma_mapping_error" [drivers/firewire/firewire-sbp2.ko] undefined!
ERROR: "dma_map_single" [drivers/firewire/firewire-sbp2.ko] undefined!
ERROR: "dma_unmap_single" [drivers/firewire/firewire-sbp2.ko] undefined!
ERROR: "scsi_dma_map" [drivers/firewire/firewire-sbp2.ko] undefined!
ERROR: "scsi_dma_unmap" [drivers/firewire/firewire-sbp2.ko] undefined!
ERROR: "dma_mapping_error" [drivers/firewire/firewire-core.ko] undefined!
ERROR: "dma_map_page" [drivers/firewire/firewire-core.ko] undefined!
ERROR: "dma_unmap_page" [drivers/firewire/firewire-core.ko] undefined!
Signed-off-by: Chen Gang <gang.chen.5...@gmail.com>
---
drivers/firewire/Kconfig | 6 +++---
drivers/firewire/core-iso.c | 15 +++++++++++++++
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 4199849..fd75278 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -19,7 +19,7 @@ config FIREWIRE
config FIREWIRE_OHCI
tristate "OHCI-1394 controllers"
- depends on PCI && FIREWIRE && MMU
+ depends on PCI && FIREWIRE && MMU && HAS_DMA
help
Enable this driver if you have a FireWire controller based
on the OHCI specification. For all practical purposes, this
@@ -30,7 +30,7 @@ config FIREWIRE_OHCI
config FIREWIRE_SBP2
tristate "Storage devices (SBP-2 protocol)"
- depends on FIREWIRE && SCSI
+ depends on FIREWIRE && SCSI && HAS_DMA
help
This option enables you to use SBP-2 devices connected to a
FireWire bus. SBP-2 devices include storage devices like
@@ -45,7 +45,7 @@ config FIREWIRE_SBP2
config FIREWIRE_NET
tristate "IP networking over 1394"
- depends on FIREWIRE && INET
+ depends on FIREWIRE && INET && HAS_DMA
help
This enables IPv4/IPv6 over IEEE 1394, providing IP connectivity
with other implementations of RFC 2734/3146 as found on several
diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 38c0aa6..995f038 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -64,6 +64,7 @@ int fw_iso_buffer_alloc(struct fw_iso_buffer *buffer, int
page_count)
return 0;
}
+#ifdef CONFIG_HAS_DMA
int fw_iso_buffer_map_dma(struct fw_iso_buffer *buffer, struct fw_card *card,
enum dma_data_direction direction)
{
@@ -86,6 +87,13 @@ int fw_iso_buffer_map_dma(struct fw_iso_buffer *buffer,
struct fw_card *card,
return 0;
}
+#else
+int fw_iso_buffer_map_dma(struct fw_iso_buffer *buffer, struct fw_card *card,
+ enum dma_data_direction direction)
+{
+ return -ENXIO;
+}
+#endif
int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
int page_count, enum dma_data_direction direction)
@@ -122,6 +130,7 @@ int fw_iso_buffer_map_vma(struct fw_iso_buffer *buffer,
return 0;
}
+#ifdef CONFIG_HAS_DMA
void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
struct fw_card *card)
{
@@ -141,6 +150,12 @@ void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
buffer->page_count = 0;
buffer->page_count_mapped = 0;
}
+#else
+void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
+ struct fw_card *card)
+{
+}
+#endif
EXPORT_SYMBOL(fw_iso_buffer_destroy);
/* Convert DMA address to offset into virtually contiguous buffer. */
--
1.7.11.7
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
