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authorJames Bottomley <James.Bottomley@suse.de>2010-03-03 11:06:56 +0530
committerJames Bottomley <James.Bottomley@suse.de>2010-03-03 21:17:06 +0530
commitfac829fdcaf451a20106cbc468ff886466320956 (patch)
tree8fd1efcabda65db1abd0bb385367bf3f8389e4db
parent98e1e0f07c3f1820b8ac424569ee9e9916d3665b (diff)
downloadblackbird-op-linux-fac829fdcaf451a20106cbc468ff886466320956.tar.gz
blackbird-op-linux-fac829fdcaf451a20106cbc468ff886466320956.zip
[SCSI] raid_attrs: fix dependency problems
RAID attributes uses scsi_is_sdev_device() to gate some SCSI specific checking code. This causes two problems. Firstly if SCSI == n just defining scsi_is_sdev_device() to return false might not be enough to prevent gcc from emitting the code (and thus referring to undefined symbols), so this needs surrounding with an ifdef. Secondly, using scsi_is_sdev_device() when SCSI is either y or m gives a subtle problem in the m case: raid_attrs must also be m to use the symbol. Do the usual Kconfig jiggery-pokery to fix this. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
-rw-r--r--drivers/scsi/Kconfig6
-rw-r--r--drivers/scsi/raid_class.c2
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 9191d1ea6451..75f2336807cb 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1,9 +1,15 @@
menu "SCSI device support"
+config SCSI_MOD
+ tristate
+ default y if SCSI=n || SCSI=y
+ default m if SCSI=m
+
config RAID_ATTRS
tristate "RAID Transport Class"
default n
depends on BLOCK
+ depends on SCSI_MOD
---help---
Provides RAID
diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c
index bd88349b8526..2c146b44d95f 100644
--- a/drivers/scsi/raid_class.c
+++ b/drivers/scsi/raid_class.c
@@ -63,6 +63,7 @@ static int raid_match(struct attribute_container *cont, struct device *dev)
* emulated RAID devices, so start with SCSI */
struct raid_internal *i = ac_to_raid_internal(cont);
+#if defined(CONFIG_SCSI) || defined(CONFIG_SCSI_MODULE)
if (scsi_is_sdev_device(dev)) {
struct scsi_device *sdev = to_scsi_device(dev);
@@ -71,6 +72,7 @@ static int raid_match(struct attribute_container *cont, struct device *dev)
return i->f->is_raid(dev);
}
+#endif
/* FIXME: look at other subsystems too */
return 0;
}
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