Messages in this thread Patch in this message | | | From | Michal Suchanek <> | Subject | [PATCH 1/2] powerpc/fadump: return 0 on re-registration | Date | Mon, 26 Jun 2017 16:06:00 +0200 |
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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 <msuchanek@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
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