3 files changed, 19 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 41f69ae79d4e..1646b76bd3d2 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -245,6 +245,12 @@ extern int early_init_dt_scan_rtas(unsigned long node,
 
 extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
 
+#ifdef CONFIG_PPC_RTAS_DAEMON
+extern void rtas_cancel_event_scan(void);
+#else
+static inline void rtas_cancel_event_scan(void) { }
+#endif
+
 /* Error types logged.  */
 #define ERR_FLAG_ALREADY_LOGGED 0x0
 #define ERR_FLAG_BOOT           0x1     /* log was pulled from NVRAM on boot */
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index e037c7494fd8..4174b4b23246 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -568,6 +568,12 @@ static void rtas_flash_firmware(int reboot_type)
         }
 
         /*
+         * Just before starting the firmware flash, cancel the event scan work
+         * to avoid any soft lockup issues.
+         */
+        rtas_cancel_event_scan();
+
+        /*
          * NOTE: the "first" block must be under 4GB, so we create
          * an entry with no data blocks in the reserved buffer in
          * the kernel data segment.
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 481ef064c8f1..1045ff49cc6d 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -472,6 +472,13 @@ static void start_event_scan(void)
                                  &event_scan_work, event_scan_delay);
 }
 
+/* Cancel the rtas event scan work */
+void rtas_cancel_event_scan(void)
+{
+        cancel_delayed_work_sync(&event_scan_work);
+}
+EXPORT_SYMBOL_GPL(rtas_cancel_event_scan);
+
 static int __init rtas_init(void)
 {
         struct proc_dir_entry *entry;