drivers/gicv3: fix logical issue for num_eints

In function gicv3_spis_config_defaults(), the variable num_ints is set
to (maximum SPI INTID + 1), while num_eints is set to (maximum ESPI
INTID). It introduces not only inconsistency to the code, but also
logical bug in the "for" loops, for the INTID of num_eints is also
valid and the check should be inclusive.

Fix this by setting num_eints to (maximum ESPI INTID + 1) as well.

Fix similar issues in gicv3_distif_save() and
gicv3_distif_init_restore().

Signed-off-by: Heyi Guo <guoheyi@linux.alibaba.com>
Change-Id: I4425777d17e84e85f38853603340bd348640154f

drivers/arm/gic/v3/gicv3_helpers.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -117,7 +117,7 @@ void gicv3_spis_config_defaults(uintptr_t gicd_base)
 		 * Maximum ESPI INTID is 32 * (GICD_TYPER.ESPI_range + 1) + 4095
 		 */
 		num_eints = ((((typer_reg >> TYPER_ESPI_RANGE_SHIFT) &
-			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID - 1;
+			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID;
 
 		for (i = MIN_ESPI_ID; i < num_eints;
 					i += (1U << IGROUPR_SHIFT)) {

drivers/arm/gic/v3/gicv3_main.c

@@ -757,7 +757,7 @@ void gicv3_distif_save(gicv3_dist_ctx_t * const dist_ctx)
 		 * Maximum ESPI INTID is 32 * (GICD_TYPER.ESPI_range + 1) + 4095
 		 */
 		num_eints = ((((typer_reg >> TYPER_ESPI_RANGE_SHIFT) &
-			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID - 1;
+			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID;
 	} else {
 		num_eints = 0U;
 	}
@@ -881,7 +881,7 @@ void gicv3_distif_init_restore(const gicv3_dist_ctx_t * const dist_ctx)
 		 * Maximum ESPI INTID is 32 * (GICD_TYPER.ESPI_range + 1) + 4095
 		 */
 		num_eints = ((((typer_reg >> TYPER_ESPI_RANGE_SHIFT) &
-			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID - 1;
+			TYPER_ESPI_RANGE_MASK) + 1U) << 5) + MIN_ESPI_ID;
 	} else {
 		num_eints = 0U;
 	}