diff options
| author | Vasant Hegde <hegdevasant@linux.vnet.ibm.com> | 2015-03-12 13:51:42 +0530 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-03-19 03:27:14 +1100 |
| commit | c3137a50fb71a253e16b56bb92f62591f288552d (patch) | |
| tree | 590b46aa6c347b969e1d28f918ddd9d005670718 /core/opal.c | |
| parent | d2e2c797f95900513eeb4ab5b5f7e0b42753c41e (diff) | |
| download | blackbird-skiboot-c3137a50fb71a253e16b56bb92f62591f288552d.tar.gz blackbird-skiboot-c3137a50fb71a253e16b56bb92f62591f288552d.zip | |
OPAL: Detect recursive poller entry from same CPU
Detect recursive opal poller call from same CPU.
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'core/opal.c')
| -rw-r--r-- | core/opal.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/core/opal.c b/core/opal.c index 6fbbdde9..5e96e0a3 100644 --- a/core/opal.c +++ b/core/opal.c @@ -285,6 +285,14 @@ void opal_run_pollers(void) struct opal_poll_entry *poll_ent; static int pollers_with_lock_warnings = 0; + /* Don't re-enter on this CPU */ + if (this_cpu()->in_poller) { + prlog(PR_ERR, "OPAL: Poller recursion detected.\n"); + backtrace(); + return; + } + this_cpu()->in_poller = true; + if (this_cpu()->lock_depth && pollers_with_lock_warnings < 64) { prlog(PR_ERR, "Running pollers with lock held !\n"); backtrace(); @@ -301,6 +309,9 @@ void opal_run_pollers(void) list_for_each(&opal_pollers, poll_ent, link) poll_ent->poller(poll_ent->data); + /* Disable poller flag */ + this_cpu()->in_poller = false; + /* On debug builds, print max stack usage */ check_stacks(); } |
