[PATCH] arm_mpam: Fix MPAMCFG_MBW_PBM register setting

[Fenghua Yu <fenghuay@nvidia.com>]

MPAMCFG_MBW_PBM is written from cfg if cfg has the MBW partition feature.
It is reset when cfg does not have the MBW partition feature.

But the register handling is reversed. This may cause an incorrect
register setting. For example, during an MPAM reset, reset_cfg is
empty (no MBW partition feature set), and cfg->mbw_pbm is 0. Instead of
resetting MPAMCFG_MBW_PBM to all 1's, the current logic will set it to
cfg->mbw_pbm, which is 0.

Fix the issue by swapping the if/else branches.

Fixes: a1cb6577f575 ("arm_mpam: Reset when feature configuration bit unset")
Reported-by: Matt Ochs <mochs@nvidia.com>
Signed-off-by: Fenghua Yu <fenghuay@nvidia.com>
---
 drivers/resctrl/mpam_devices.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c
index 4b93e89c2678..d8b0383cee92 100644
--- a/drivers/resctrl/mpam_devices.c
+++ b/drivers/resctrl/mpam_devices.c
@@ -1570,9 +1570,9 @@ static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid,
 
 	if (mpam_has_feature(mpam_feat_mbw_part, rprops)) {
 		if (mpam_has_feature(mpam_feat_mbw_part, cfg))
-			mpam_reset_msc_bitmap(msc, MPAMCFG_MBW_PBM, rprops->mbw_pbm_bits);
-		else
 			mpam_write_partsel_reg(msc, MBW_PBM, cfg->mbw_pbm);
+		else
+			mpam_reset_msc_bitmap(msc, MPAMCFG_MBW_PBM, rprops->mbw_pbm_bits);
 	}
 
 	if (mpam_has_feature(mpam_feat_mbw_min, rprops)) {
-- 
2.43.0