__setup() handlers should return 1 to obsolete_checksetup() in init/main.c to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) argument or environment strings. Also, error return codes don't mean anything to obsolete_checksetup() -- only non-zero (usually 1) or zero. So return 1 from xive_off() and xive_store_eoi_cmdline().
Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") Fixes: c21ee04f11ae ("powerpc/xive: Add a kernel parameter for StoreEOI") Signed-off-by: Randy Dunlap <rdun...@infradead.org> From: Igor Zhbanov <i.zhba...@omprussia.ru> Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0de...@omprussia.ru Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Michael Ellerman <m...@ellerman.id.au> Cc: Cédric Le Goater <c...@kaod.org> Cc: Paul Mackerras <pau...@samba.org> --- arch/powerpc/sysdev/xive/common.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- linux-next-20220310.orig/arch/powerpc/sysdev/xive/common.c +++ linux-next-20220310/arch/powerpc/sysdev/xive/common.c @@ -1708,20 +1708,20 @@ __be32 *xive_queue_page_alloc(unsigned i static int __init xive_off(char *arg) { xive_cmdline_disabled = true; - return 0; + return 1; } __setup("xive=off", xive_off); static int __init xive_store_eoi_cmdline(char *arg) { if (!arg) - return -EINVAL; + return 1; if (strncmp(arg, "off", 3) == 0) { pr_info("StoreEOI disabled on kernel command line\n"); xive_store_eoi = false; } - return 0; + return 1; } __setup("xive.store-eoi=", xive_store_eoi_cmdline);