misc: apanic: erase kpanic when no data

erase kpanic partition when there is no data(console and thread)

Signed-off-by: Tom Zhu <a2289c@android-hal-04.(none)>
Signed-off-by: San Mehat <san@google.com>

diff --git a/drivers/misc/apanic.c b/drivers/misc/apanic.c
index f50881b..ca875f8 100644 (file)
--- a/drivers/misc/apanic.c
+++ b/drivers/misc/apanic.c
@@ -297,6 +297,7 @@ static void mtd_panic_notify_add(struct mtd_info *mtd)
        struct panic_header *hdr = ctx->bounce;
        size_t len;
        int rc;
+       int    proc_entry_created = 0;
 
        if (strcmp(mtd->name, CONFIG_APANIC_PLABEL))
                return;
@@ -358,6 +359,7 @@ static void mtd_panic_notify_add(struct mtd_info *mtd)
                        ctx->apanic_console->write_proc = apanic_proc_write;
                        ctx->apanic_console->size = hdr->console_length;
                        ctx->apanic_console->data = (void *) 1;
+                       proc_entry_created = 1;
                }
        }
 
@@ -372,9 +374,13 @@ static void mtd_panic_notify_add(struct mtd_info *mtd)
                        ctx->apanic_threads->write_proc = apanic_proc_write;
                        ctx->apanic_threads->size = hdr->threads_length;
                        ctx->apanic_threads->data = (void *) 2;
+                       proc_entry_created = 1;
                }
        }
 
+       if (!proc_entry_created)
+               mtd_panic_erase();
+
        return;
 out_err:
        ctx->mtd = NULL;