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authorArnd Bergmann <arnd@arndb.de>2016-02-11 17:23:51 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-02-12 07:13:35 +0300
commit28c09ec4b6b7a2f9f769966baf54eaf0d6fadf8c (patch)
tree75078a403cb7d5fff1a8c22e8c4dd9b0f4257b23 /drivers/firmware
parent9b3ec23ae9e4cd810f754c4cb9bff030a3a9d3ac (diff)
downloadlinux-28c09ec4b6b7a2f9f769966baf54eaf0d6fadf8c.tar.xz
firmware: qemu config needs I/O ports
Not all machines have PCI style I/O port memory, or they do not allow mapping it using the ioport_map() function, whcih results in a build error with the newly added qemu firmware code: drivers/firmware/built-in.o: In function `fw_cfg_io_cleanup': qemu_fw_cfg.c:(.text+0x144): undefined reference to `ioport_unmap' drivers/firmware/built-in.o: In function `fw_cfg_sysfs_probe': qemu_fw_cfg.c:(.text+0xb18): undefined reference to `ioport_map' This adds a Kconfig dependency to ensure the driver can only be built on platforms that support it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 75f3e8e47f38 ("firmware: introduce sysfs driver for QEMU's fw_cfg device") Acked-by: Gabriel Somlo <somlo@cmu.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 5130f74ae3bd..6664f1108c7c 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -164,6 +164,7 @@ config RASPBERRYPI_FIRMWARE
config FW_CFG_SYSFS
tristate "QEMU fw_cfg device support in sysfs"
depends on SYSFS && (ARM || ARM64 || PPC_PMAC || SPARC || X86)
+ depends on HAS_IOPORT_MAP
default n
help
Say Y or M here to enable the exporting of the QEMU firmware