riscv: Set SBI_SUCCESS on successful DBCN call

Ensure we explicitly set SBI_SUCCESS on a successful SBI calls
since KVM will not initialize it to zero for us. Only DBCN was
neglecting to do so.

Fixes: 4ddaa4249e0c ("riscv: Handle SBI DBCN calls from Guest/VM")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20240821142610.3297483-4-apatel@ventanamicro.com
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed