[PATCH v2 3/5] lib: utils/irqchip: plic: Fix the off-by-one error in plic_context_init()

[Bin Meng]

The number of interrupt enable register in words was once correct,
but was wrongly changed to have an off-by-one error since
commit 8c362e7d065e ("lib: irqchip/plic: Factor out a context init function").

Fixes: 8c362e7d065e ("lib: irqchip/plic: Factor out a context init function")
Signed-off-by: Bin Meng <bmeng at tinylab.org>

---

Changes in v2:
- new patch: lib: utils/irqchip: plic: Fix the off-by-one error in plic_context_init()

 lib/utils/irqchip/plic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/utils/irqchip/plic.c b/lib/utils/irqchip/plic.c
index c5c1879..5b87d3b 100644
--- a/lib/utils/irqchip/plic.c
+++ b/lib/utils/irqchip/plic.c
@@ -121,7 +121,7 @@ int plic_context_init(const struct plic_data *plic, int context_id,
 	if (!plic || context_id < 0)
 		return SBI_EINVAL;
 
-	ie_words = (plic->num_src + 31) / 32;
+	ie_words = plic->num_src / 32 + 1;
 	ie_value = enable ? 0xffffffffU : 0U;
 
 	for (u32 i = 0; i < ie_words; i++)
-- 
2.34.1