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authorDave Peterson <dsp@llnl.gov>2006-03-26 13:38:49 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-26 20:57:07 +0400
commit472678ebd30d87cbe8d97562dcc0e46d1076040f (patch)
tree216f22045fb3b786f513f000b184e5fd449b58d1 /drivers/edac/edac_mc.h
parent6e5a8748507dea83386d1d76c58aeaed1ff5a1ec (diff)
downloadlinux-472678ebd30d87cbe8d97562dcc0e46d1076040f.tar.xz
[PATCH] EDAC: kobject/sysfs fixes
- After we unregister a kobject, wait for our kobject release method to call complete(). This causes us to wait until the kobject reference count reaches 0. Otherwise, a task accessing the EDAC sysfs interface can hold the reference count above 0 until after the EDAC module has been unloaded. When the reference count finally drops to 0, this will result in an attempt to call our release method inside the EDAC module after the module has already been unloaded. This isn't the best fix, since a process can get stuck sleeping forever uninterruptibly if the user does the following: rmmod my_module < /sys/my_sysfs/file I'll go back and implement a better fix later. However this should be ok for now. - Call edac_remove_sysfs_mci_device() from edac_mc_del_mc() rather than from edac_mc_free(). Since edac_mc_add_mc() calls edac_create_sysfs_mci_device(), edac_mc_del_mc() should call edac_remove_sysfs_mci_device(). Signed-off-by: David S. Peterson <dsp@llnl.gov> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/edac/edac_mc.h')
-rw-r--r--drivers/edac/edac_mc.h9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index 0bcc3797c753..c9c1590db721 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -185,11 +185,6 @@ enum scrub_type {
#define SCRUB_FLAG_HW_PROG_SRC BIT(SCRUB_HW_PROG_SRC_CORR)
#define SCRUB_FLAG_HW_TUN BIT(SCRUB_HW_TUNABLE)
-enum mci_sysfs_status {
- MCI_SYSFS_INACTIVE = 0, /* sysfs entries NOT registered */
- MCI_SYSFS_ACTIVE /* sysfs entries ARE registered */
-};
-
/* FIXME - should have notify capabilities: NMI, LOG, PROC, etc */
/*
@@ -299,6 +294,7 @@ struct csrow_info {
struct mem_ctl_info *mci; /* the parent */
struct kobject kobj; /* sysfs kobject for this csrow */
+ struct completion kobj_complete;
/* FIXME the number of CHANNELs might need to become dynamic */
u32 nr_channels;
@@ -320,8 +316,6 @@ struct mem_ctl_info {
unsigned long scrub_cap; /* chipset scrub capabilities */
enum scrub_type scrub_mode; /* current scrub mode */
- enum mci_sysfs_status sysfs_active; /* status of sysfs */
-
/* pointer to edac checking routine */
void (*edac_check) (struct mem_ctl_info * mci);
/*
@@ -359,6 +353,7 @@ struct mem_ctl_info {
/* edac sysfs device control */
struct kobject edac_mci_kobj;
+ struct completion kobj_complete;
};