From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
[ Upstream commit d64e3eab75a8e1e900c0fda2410a2df8893d8f85 ]
__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")
[lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@xxxxxxxxxxxx]
Reported-by: Igor Zhbanov <i.zhbanov@xxxxxxxxxxxx>:
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220313065936.4363-1-rdunlap@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/powerpc/sysdev/xive/common.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
index 1ca5564bda9d..89c86f32aff8 100644
--- a/arch/powerpc/sysdev/xive/common.c
+++ b/arch/powerpc/sysdev/xive/common.c
@@ -1708,20 +1708,20 @@ __be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift)
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);
--
2.34.1
