[PATCH v4 06/15] drm/i915/dmc_wl: Use sentinel item for range tables

[Gustavo Sousa]

We are currently using ARRAY_SIZE() to iterate address ranges in
intel_dmc_wl_check_range(). In upcoming changes, we will be using more
than a single table and will extract the range checking logic into a
dedicated function that takes a range table as argument. As we will not
able to use ARRAY_SIZE() then, let's make range tables contain a
sentinel item at the end and use that instead of having to pass the size
as parameter in this future function.

Reviewed-by: Luca Coelho <luciano.coelho at intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dmc_wl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dmc_wl.c b/drivers/gpu/drm/i915/display/intel_dmc_wl.c
index e837c39491bb..1753c334f3fd 100644
--- a/drivers/gpu/drm/i915/display/intel_dmc_wl.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc_wl.c
@@ -53,6 +53,7 @@ struct intel_dmc_wl_range {
 
 static struct intel_dmc_wl_range lnl_wl_range[] = {
 	{ .start = 0x60000, .end = 0x7ffff },
+	{},
 };
 
 static void __intel_dmc_wl_release(struct intel_display *display)
@@ -104,7 +105,7 @@ static bool intel_dmc_wl_check_range(i915_reg_t reg)
 	bool wl_needed = false;
 	u32 offset = i915_mmio_reg_offset(reg);
 
-	for (i = 0; i < ARRAY_SIZE(lnl_wl_range); i++) {
+	for (i = 0; lnl_wl_range[i].start; i++) {
 		if (offset >= lnl_wl_range[i].start &&
 		    offset <= lnl_wl_range[i].end) {
 			wl_needed = true;
-- 
2.47.0