[PATCH 1/2] powerpc/fadump: return 0 on re-registration

[Michal Suchanek]

When fadump is already registered return success.

Currently EEXIST is returned which is difficult to handle race-free in
userspace when shell scripts are used. If multiple writers are trying to
write '1' there is no difference in whichever succeeds so just return 0
to all.

Signed-off-by: Michal Suchanek <msucha...@suse.de>
---
 arch/powerpc/kernel/fadump.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 436aedf195ab..5a7355381dac 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1214,7 +1214,6 @@ static ssize_t fadump_register_store(struct kobject *kobj,
                break;
        case '1':
                if (fw_dump.dump_registered == 1) {
-                       ret = -EEXIST;
                        goto unlock_out;
                }
                /* Register Firmware-assisted dump */
-- 
2.10.2