The patch titled
ieee1394: nodemgr: grab class.subsys.rwsem in nodemgr_resume_ne()
has been added to the -mm tree. Its filename is
ieee1394-nodemgr-grab-classsubsysrwsem-in.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ieee1394: nodemgr: grab class.subsys.rwsem in nodemgr_resume_ne()
From: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
nodemgr_resume_ne was iterating over nodemgr_ud_class.children without
protection by nodemgr_ud_class.subsys.rwsem.
FIXME:
Shouldn't we rather use class->sem there, not class->subsys.rwsem?
Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/ieee1394/nodemgr.c | 2 ++
1 files changed, 2 insertions(+)
diff -puN drivers/ieee1394/nodemgr.c~ieee1394-nodemgr-grab-classsubsysrwsem-in drivers/ieee1394/nodemgr.c
--- a/drivers/ieee1394/nodemgr.c~ieee1394-nodemgr-grab-classsubsysrwsem-in
+++ a/drivers/ieee1394/nodemgr.c
@@ -1352,6 +1352,7 @@ static void nodemgr_resume_ne(struct nod
ne->in_limbo = 0;
device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
+ down_read(&nodemgr_ud_class.subsys.rwsem);
down_read(&ne->device.bus->subsys.rwsem);
list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
ud = container_of(cdev, struct unit_directory, class_dev);
@@ -1363,6 +1364,7 @@ static void nodemgr_resume_ne(struct nod
ud->device.driver->resume(&ud->device);
}
up_read(&ne->device.bus->subsys.rwsem);
+ up_read(&nodemgr_ud_class.subsys.rwsem);
HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
_
Patches currently in -mm which might be from stefanr@xxxxxxxxxxxxxxxxx are
git-ieee1394.patch
ieee1394-fix-kerneldoc-of-hpsb_alloc_host.patch
ieee1394-shrink-tlabel-pools-remove-tpool-semaphores.patch
ieee1394-remove-include-asm-semaphoreh.patch
ieee1394-sbp2-safer-last_orb-and.patch
ieee1394-sbp2-discard-return-value-of.patch
ieee1394-sbp2-optimize-dma-direction-of.patch
ieee1394-sbp2-safer-initialization-of.patch
ieee1394-sbp2-more-checks-of-status.patch
ieee1394-sbp2-convert.patch
ieee1394-safer-definition-of-empty-macros.patch
ieee1394-sbp2-workaround-for-write-protect-bit-of.patch
ieee1394-sbp2-enable-auto-spin-up-for-all-sbp-2-devices.patch
config_pm=n-slim-drivers-ieee1394-ohci1394c.patch
the-scheduled-removal-of-drivers-ieee1394-sbp2cforce_inquiry_hack.patch
ieee1394-sbp2-handle-sbp2util_node_write_no_wait-failed.patch
ieee1394-sbp2-safer-agent-reset-in-error-handlers.patch
ieee1394-sbp2-recheck-node-generation-in-sbp2_update.patch
ieee1394-sbp2-better-handling-of-transport-errors.patch
ieee1394-sbp2-update-includes.patch
ieee1394-sbp2-prevent-rare-deadlock-in-shutdown.patch
initialize-ieee1394-early-when-built-in.patch
ieee1394-sbp2-more-help-in-kconfig.patch
ieee1394-nodemgr-fix-rwsem-recursion.patch
ieee1394-nodemgr-grab-classsubsysrwsem-in.patch
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