summaryrefslogtreecommitdiff
path: root/drivers/rapidio/rio-scan.c
diff options
context:
space:
mode:
authorAlexandre Bounine <alexandre.bounine@idt.com>2013-07-04 02:08:53 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 03:08:04 +0400
commit9edbc30b434f56258d03faac5daf37a555384db3 (patch)
treed6454e8d28a6177d31f91bf081bb0602b8c73056 /drivers/rapidio/rio-scan.c
parente6161d64263ee7a903acdde1a8ab7d4221d5512f (diff)
downloadlinux-9edbc30b434f56258d03faac5daf37a555384db3.tar.xz
rapidio: update enumerator registration mechanism
Update enumeration/discovery method registration mechanism to allow loading enumeration/discovery methods before all mports are registered. Existing statically linked RapidIO subsystem expects that all available RapidIO mport devices are initialized and registered before the enumeration/discovery method is registered. Switching to loadable mport device drivers creates situation when mport device driver can be loaded after enumeration/discovery method is attached (e.g., loadable mport driver in a system with statically linked RapidIO core and enumerator). This also will happen in a system with hot-pluggable RapidIO controllers. To remove the dependency on the initialization/registration order this patch introduces enumeration/discovery registration mechanism that supports arbitrary registration order of mports and enumerator/discovery methods. The following registration rules are implemented: - only one enumeration/discovery method can be registered for given mport ID (including RIO_MPORT_ANY); - when new enumeration/discovery methods tries to attach to the registered mport device, method with matching mport ID will replace a default method previously registered for given mport (if any); - enumeration/discovery method with target ID=RIO_MPORT_ANY will be attached only to mports that do not have another enumerator attached to them; - when new mport device is registered with RapidIO subsystem, registration routine searches for the enumeration/discovery method with the best matching mport ID; Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Andre van Herk <andre.van.herk@Prodrive.nl> Cc: Micha Nelissen <micha.nelissen@Prodrive.nl> Cc: Stef van Os <stef.van.os@Prodrive.nl> Cc: Jean Delvare <jdelvare@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio/rio-scan.c')
-rw-r--r--drivers/rapidio/rio-scan.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 913950212605..ab837fdb2383 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -1162,6 +1162,7 @@ bail:
}
static struct rio_scan rio_scan_ops = {
+ .owner = THIS_MODULE,
.enumerate = rio_enum_mport,
.discover = rio_disc_mport,
};