[PATCH 2/3] memory: tegra: Parameterise Tegra264 MCF slice bound

[Ketan Patil <ketanp@nvidia.com>]

Replace the hard-coded slice bound check in handle_mcf_irq() with a
TEGRA264_MC_NUM_SLICES define, so the number of MCF slices is named
rather than being an unexplained literal.

Note that although the existing logic is correct, the actual number of
MCF slices for Tegra264 is 5 and not 4. So define TEGRA264_MC_NUM_SLICES
as 5 and update the logic accordingly.

No functional change intended.

Signed-off-by: Ketan Patil <ketanp@nvidia.com>
---
 drivers/memory/tegra/tegra264.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/tegra/tegra264.c b/drivers/memory/tegra/tegra264.c
index 56e55269eed7..b40275ae382e 100644
--- a/drivers/memory/tegra/tegra264.c
+++ b/drivers/memory/tegra/tegra264.c
@@ -727,6 +727,9 @@ static const char *const tegra264_rt_error_names[16] = {
 #define TEGRA264_MC_APERTURE_UPHY	10
 #define TEGRA264_MC_APERTURE_TOP	11
 
+/* Tegra264 splits the MCF common interrupt status across five slices. */
+#define TEGRA264_MC_NUM_SLICES 5
+
 /*
  * tegra264_mc_icc_set() - Pass MC client info to the BPMP-FW
  * @src: ICC node for Memory Controller's (MC) Client
@@ -941,7 +944,7 @@ static irqreturn_t handle_mcf_irq(int irq, void *data)
 
 	for_each_set_bit(slice, &common_intstat, 32) {
 		/* Find out the slice number on which interrupt occurred */
-		if (slice > 4) {
+		if (slice >= TEGRA264_MC_NUM_SLICES) {
 			dev_err(mc->dev, "Slice index out of bounds: %u\n", slice);
 			return IRQ_NONE;
 		}
-- 
2.43.0