[Skiboot] [PATCH 4/4] psi: Properly mask errors in SEMR

[Joel Stanley]

It looks like this code intended to read PSIHB SEMR, mask out some of
the values, and write it back. Instead it writes the mask to the
register.

Found using scan-build.

Fixes: 39addc6a0f1f ("PSI: Reorganize PSI link down handling code")
Signed-off-by: Joel Stanley <joel at jms.id.au>
---
 hw/psi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/psi.c b/hw/psi.c
index f7d8cd9a459d..f5168ba96765 100644
--- a/hw/psi.c
+++ b/hw/psi.c
@@ -74,7 +74,7 @@ void psi_disable_link(struct psi *psi)
 
 		/* Mask errors in SEMR */
 		reg = in_be64(psi->regs + PSIHB_SEMR);
-		reg = ((0xfffull << 36) | (0xfffull << 20));
+		reg &= ((0xfffull << 36) | (0xfffull << 20));
 		out_be64(psi->regs + PSIHB_SEMR, reg);
 		printf("PSI: SEMR set to %llx\n", reg);
 
-- 
2.17.0